>>302697473
If you don't have the option to choose male avatars, then you could still have a female or genderless avatar. Then choosing the genderless avatar as a male over the female doesn't make you more gay, but it makes you less heterosexual.

If you can only choose a single form of avatar, then you can only either choose that one or not to play. In that case, choosing to play as the male avatar would still very slightly make you gay, depending on how viable of a choice not playing is - but less so than when you had real choice. Similarly, choosing the female avatar would still make you slightly straight, but not as much as when there was real choice.