Bishop,

Ever try male-male yourself? Don't decry it until you've tried it. It can be very hot.

As for venereal diseases, I'd be quite concerned about straight guys who go sticking their uncovered penises up every female backside they find. They pose a risk of syphilis, gonorrhea, HIV...you name it. And the women themselves also pose a risk to others. Straights are no more immune than anyone else, so stop trying to portray them as a protected species. Disease don't discriminate, pal.