Don’t forger “Oh, look a tiny purse popped out of my mouth. How gay is that?” 
I’m outraged; how could you leave Finn out of the gayquation? :mad: He has terrible luck with girls; they all seem to use him for their own twisted mind games while denying him sex. All he needs to do is “forget” Kurt’s birthday once, and come up with a surprise “gift” at the last minute. 
Santana managed to use him for her own twisted mind games without denying him sex, although I’m not sure if this is better or worse from Finn’s perspective. If he thinks “The only girl who wanted to have sex with me was only doing it to cause trouble, she wasn’t attracted to me or even dudes in general!” then that’s pretty sad. But “I lost my virginity to a hot, slutty lesbian cheerleader!” will be a good story to tell in college.
I half expect Santana to point this out to Finn and Sam herself. (Puck probably wouldn’t need to have it explained.)
Plus the occasional appearances of the Pink Dagger. And the oft mentioned, never seen (except in a photo in at least one version of the pilot which may or may not be canon) gay dads of Rachel.
Speaking of the Pink Dagger, I always wondered whatever happened to that kid he molested in the pre-Shu glee club. I get why Sandy got fired, but why did the kid vanish? Did he transfer to Blaine’s school or something? (rhetorical questions, not seriously thinking there’s anything more to it than “the kid was an extra”)
The very thorough Glee Wikia has an article about him, although there’s not much more to it than what you’ve already said. His name is Hank Saunders, and he can supposedly be seen in the background at the celibacy club meeting in “Showmance”. I guess we can imagine that being groped by Sandy, plus clashing with Rachel, was enough to make Hank want nothing to do with glee club again.
Glee co-creator Ian Brennan got the idea for this from something that happened at his old high school: the choir director (apparently not the same director from when Brennan was a show choir member) was convicted of sexually assaulting a student.