When does a boy realise he is gay?

Well mostt ,obviously, aren't actually gay but they must realise when then are acting gay. also it depends on which kind of gay you mean cos me and my friend ahd a fight cos i her callled her gay! silly i know but now we have decided that wea re gay experts and many types of gay. good, funny, annoying etc.... im guessing you mean annoying but yes they do realise.Boys smelll lol obviously the above answer is incorrect. boys tend to realise that they are gay from as young as 18 years of age (according to a teacher at a school i went to). i realised that my brother was gay when he started an obsession over penis's. he began drawing them on spare pieces of paper, and began watching gay porn. I knew I was "different" from about age 9. I went through a bisexual phase in college, and didn't finally come out to myself until my late 20's. And I know some guys who didn't realize that they were gay until their 50's.