As an introduction, I'm a gay man in my mid-30s. I am in a committed relationship with my partner (X) and we have been very happy together (and sexually active) for 10 years now. As some straights often ask, 'Which is one of you is The Man?'. Well, sometime the stereotypes are true. In our case, X is a total bottom. He has experimented maybe 3 or 4 times over the past decade with being 'on top' but much prefers being...