Lawd a mercy, it's 2016! Firstly and most importantly, being homosexual... queer... gay... is totally okay. With that out of the way, there aren't really inherently homosexual or heterosexual sex acts. It's the people involved that determine whether a sexual dynamic may be hetero or homo.
For example, anal sex (or Greek if you prefer) is a sex act that is enjoyed by some gay men. And also, anal sex is not a "gay" sex act. People of various genders and sexual orientations enjoy being a top or bottom when it comes to anal penetration!
Skin Diamond and Lexington Steele
Or...
Daisy Ducati and Mike Panic