A Gliding Monkey is a guy that is stupid enough to reject multiple instances of sex with a beautiful girl and instead choose a one night stand with said hot girl. (It is not because the girl rejects him due to bad sex, this is referred to as a Disgraceful Dick, it is the man's decision in the case of a Gliding Monkey)
What kind of dumbass would give a Gliding Monkey to Carly, with an ass like that.
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi