I've just read through all these replies and found them very interesting..
I'm a bi-sexual who was married to a woman for 15 years (we divorced last year after a three year seperation), although our sex life was inactive after six - we only stayed together for our daughter (now 15). All the time, we used condoms, although my wife got pregnant because one split.
I've not had a steady gay relationship. I'm more bottom but anytime I've had sex, it's always been with a condom. When I've met people via websites, I've told them I have a rule and that when doing oral sex for the first time, condoms must be worn, by the two of us.