Let’s start with a little quiz. Who look like they’re having more fun together – Abhishek-Aishwarya or Amitabh-Tabu? Chances are you’ll opt for the latter. Swimsuit calendars? You’ll say Vijay Mallya. Dirty old man? You’ll say Khushwant Singh. Gorgeous, acid penned columnist? You’ll say Shobhaa Dey.
The 50 plus guys, they are everywhere and unabashedly in your face in their snazzy haircuts, designer wardrobes and that nonchalant swagger of style that comes, alas, only with age. They are busy rewriting the rules of the game. They are teaching us that as life goes on, it just gets better. That there is a lot more to growing old than graying hair and diabetes. That bikini babes, racy novels and the thrill of a romantic relationship are not just the privileges of the young and the restless. And wonder of wonders, except for a few folks in saffron underwear, the rest of us have grown up enough to accept it too.
We can smilingly relate to a love story where boy meets girl and they fall in love, so what if the boy is 64 and the girl, 34 (Chini Kum). We can sigh over the dilemma of a 50-plus  married man falling in love with a teenage girl (Nishabd). We can laugh at Sexy Sam (Bachchan once again as Abhishek’s dad) whose insuppressible libido lands him in the arms of one phirang babe after another in Kabhi Alvida Na Kehna. We can empathise with the sensitive and artistic Akshaye Khanna of the cute lopsided grin when he falls in love with a much older, divorced, alcoholic mother of one in Dil Chahta Hai. Kudos to the new age directors and story writers who have made on-screen romantic relationships live and breathe and lose that cardboard quality of two-dimensional puppy love. Who are sensitising a whole new generation of young Indians in Levi jeans and singlets (along with their appas and ammas)  to the fact that relationships are formed with the heart and the heart doesn’t stop beating at 30 or 40 or whatever age society had so far given a sanction to.
It’s time to rejoice, we are growing up. And so are the movies. Check out Honeymoon Travels Pvt Ltd, Reema Kagti’s romantic comedy about six couples  on a bus ride from Mumbai to Goa, and the cutest of the lot will be Boman Irani’s Oscar Fernandez and Shabana’s Nahid – middle aged, just married and the target of constant ridicule by their companions. They are so much in love that they even share an on screen kiss. In Gautam Ghosh’s Yatra, a multilayered, complex, story, Rekha plays Lajwanti, the sensuous courtesan from Benaras, who Nana Patekar’s character – an ageing writer – becomes obsessed with.
Chasing young girls!
Those who dared to ask Ghose, why Rekha? got the quick answer “for the mystery in her eyes”. It’s time to rejoice also for ageing (oops, maturing) film stars like Sanjay Dutt and Shahrukh Khan who no longer need to tuck their tummies in to fit into with-lycra T shirts and colour their hair black to continue to play collegiates romancing young babes for the rest of their on screen lives. (Imagine the agony of Rishi Kapoor who spent more than a decade holding his breath and wearing tight sweaters to disguise a Butter Chicken belly only to chase younger girls around tall trees).
Directors are making it more believable than that and even image conscious film stars are gamely playing  along. In Main Hoon Na, Shahrukh plays a college dandy but with a difference, he is an Army major who enrolls because he is on a secret mission – an older man with a severe hair style and tacky clothes trying desperately to blend in with the kids. His romantic interest is not a student but an older and certainly sexier Chemistry teacher, Sushmita Sen in her clinging, chiffon sari best. And if we ask you to chose between Amrita Rao and Sushmita Sen in the movie there are no prizes for guessing which one you will rate as hotter.
In real life too, it is the same story. If you look at celebs alone, Archana Pooran Singh has married Parmeet Sethi,  seven years her junior. Sachin Tendulkar is happily married to an older Anjali, practicing pediatrician with JJ Hospital, the age difference of  four years hardly making a difference. In fact, in a BBC interview, when asked who his dream woman was, the master blaster immediately replied: “my wife”. Farah Khan and Shirish Kunder and Zarina Wahab-Aditya Pancholi are two other couples where the wives are older to their husbands.
Let’s end with the same old quiz: who would you rather watch - Amitabh-Tabu or Abhishek-Aishwarya? Even if your answer is Abhi-Aish, let’s not forget, she’s older to him by two years. Be it real life or its reel counterpart – relationships and perceptions, they’re both changing. And, it’s a happy thought, that so are we. Romantic relationships are all about love. Right? What’s age got to do with it!
What’s age got to do with love?
*Dil Chahta Hai
A fresh out of college Askhaye Khanna loses his heart to Dimple, the gorgeous though much older alcoholic and mother of a child who is not allowed to meet her.
*Kabhi Alvida Na Kehna
A married man (SRK) falls in love with a woman married to another man (Rani Mukherjee), after both marriages have lost their spark. Meanwhile, cheated man’s widower father (Bachchan Sr as Sexy Sam) is busy sleeping around with a bevy of phirang beauties.
*Nishabd
A photographer in his fifties (Bachchan Sr again) falls in love with a leggy teenager, though after much melodrama in the family he regretfully lets her go at the end of the movie.
nCheeni Kum
Boy (Amitabh Bachchan) meets girl (Tabu) and they fall in love. Only, the boy is 64, girl is 34 and girl’s father (Paresh Rawal) is in  his  late fifties.
*Yatra
An ageing writer (Nana Patekar) gets  obsessed with one of his characters, the mysterious courtesan Lajwanti (played by Rekha).
Does age difference matter?

“Extreme age differences between husband and wife may lead to infidelity" says author and infidelity expert, Ruth Houston. "The biggest danger" says Houston, author of ‘Is He Cheating on You?’ "is that in marriages where there is an age difference of 15 to 20 years or more, at some point, there is likely to be a disparity in the sex drives of the two people involved. This disparity could be a contributing factor to infidelity if it drives one party to seek sexual fulfillment outside the primary relationship."
Houston points out that lifestyle differences, differences in moral values, even differences in seemingly minor things such as tastes in music, reading, or entertainment may eventually cause the couple to be unable to relate to each other because of a "generation gap." While conceding some marriages and relationships between older women and younger men do succeed, Houston states that they start out with a strike against them. She warns, "A woman should think long and hard before entering into a relationship with a man who is considerably younger than herself.”
A number of slang terms exist to describe pairings in which one individual is older than the other:
Bobcat : refers to a woman in her 30s who sexually pursues younger men.
Toyboy (or boytoy): refers to a young boy or man in a relationship with an older woman or man. Use of this terminology is considered by some to be impolite.
Haguar: refers to an unattractive older woman, usually in her 40s, who makes                   unsuccessful sexual advances on younger men.
Cougar : refers to an older woman, usually in her 40s who sexually pursues younger men.
Chickenhawk: describes a much older gay man who "preys" on younger males, i.e. ‘twinks’ or underage boys. The term was used as the name of a television documentary.
Golddigging: refers to a relationship in which a young person pursues an older person for monetary gain.
Lolita : refers to a sexually precocious young girl who is the object of desire of a significantly older man. The term refers to the title character of Vladimir Nabokov's novel Lolita, who is referred to by the book's narrator, Humbert Humbert, as a nymphet. While ‘nymphet’ is still used to refer to children, "Lolita" has come to be applied to older adolescents and young women in the context of pornography. In South America, ‘Lolita’ is slang for a prostitute.
May-December Romance: is a general and non-prejudicial expression for an age-disparate relationship. The expression draws an implicit analogy between one's lifetime and the time of year. Thus ‘May’ refers to the younger partner, who is in the spring of his or her life. "December" is the elder partner, in the winter of his or her life.
Mrs Robinson: a reference to the movie The Graduate, refers to an older woman romantically involved with a younger man.
Robbing the Cradle: (also known as Cradle Snatching) may refer to a situation in which an older individual seduces a much younger one; the term stigmatises the act through its use of the word "robbing". The tone of this phrase is highly situational—in some cases, where consensuality in a relationship is clear, it is often used in a jesting manner, but where consensuality may not be evident, it can be intended in a very pejorative sense. People who 'rob the cradle' are commonly called "cradle snatchers" or "cradle robbers". 
Sourced from Wikipedia
(Some of the slang words may be considered offensive language)