Intergenerational gay relationships

I am looking for a novel that reflects an intergenerational gay relationship to reccomend to our men's book club. We recently read Michael Tolliver Lives and had a great discussion between younger and older men in the group. Any suggestions?

Yes, John. I would recommend Mishima Yukio's Forbidden Colours. It may not be quite what your group would prefer, but, well, take a look:

http://www.epinions.com/review/Forbidden_Colors_by_Yukio_Mishima/content_4183696...

Edmund White's The married man has a couple of lovers some 20+ years apart in age. There's also a wonderful story in his Skinned alive, with an older protagonist (fifties) and his flighty younger lover (twenties).