i think the problem most people (inc me) are having is that you associated gay with wrong.
Then I shall clarify.
I actually associate the gay sex scene in that computer game with "Yuk - don't want to see that kind of thing personally, would't want my kids seeing it either".
I suspect that a lot of gay people might have similar views on heterosexual sex.
I just don't see the need for it tbh and I suspect it's just the games companies pandering to a small minority of gamers.
<SHRUGS> I could well be totally wrong.