Why are they attracted to each other? And why does it offend some members of the gay community so much? With Tom Daley  making headlines for his engagement to to Dustin Lance Black  this year, GT talks to five gay men to discover whether or not we should mind the gap. Immediately you assume the attraction is either based on a mutually satisfactory financial agreement, a daddy fetish or a mid-life crisis.
But does an age gap relationship need strings attached to work? Most of us in the gay community have dated, or at least had a one-nighter, with someone considerably older or younger than us.
And in some cases, it can find the older man branded a pervert or manipulator while his younger counterpart is dismissed as a gold digger. They began dating three years ago after meeting online. But the age gap worried me, even though the more time we spent together, the more we got on. And soon I realised I was being prejudiced about younger guys. Freud might encourage the assumption that there are a few father issues for both the younger and older man.
We may see manipulation, a life crisis, one being kept or something worse. However, an age gap relationship can be functional and successful if built on solid foundations with mutuality. Oscar Wilde was 36 when he became involved with the year-old Lord Alfred Douglas. Stephen Fry made headlines in when he started dating actor Steven Webb, despite their year age difference.
And designer Calvin Klein was 48 years older than his ex-partner, model Nick Gruber. But that nine years was enough for Joe to be on the receiving end of a flurry of nasty Facebook messages when the two began dating. But when it came to talking about my relationship with James, I got so much hate online. If I post pictures of us I will get more than messages saying they want to sleep with him. The age gap comments were a whole new level of nastiness and jealousy. At one point I even thought about ending the relationship; it would have been so much easier to go out with someone my own age.
We also consider shared core values, background, lifestyle, goals, personality and attraction. So older gay partners can become a role model, a teacher and protective elder friend. In return, it can bring out the paternal side of an older gay man. Older men are very, very insecure. They want a good-looking lad on their arm to control them. Sex was not necessarily exchanged for financial compensation, the older partner offered intelligence and social accomplishments, which are often as strongly attractive to younger partners as material possessions.
The generation gap for gay men is potentially massive.