I heard Rabbi Lionel Blue on Radio 4 this morning, as I remember it he was talking about labelling people as a type and then giving the label common attributes. He was talking about all Jews being thought of as rich and the hatred that propogated in WWII (his family and those he knew were not rich)

Homosexual is a label like any other, the only common behaviour is homosexuality, apart from that these people are as varied in every other sense as any other sub group of humanity
So might I suggest that we may all know homosexual people, the fact that they refuse to wear the label and be 'different' in all aspects of their life means that we do not notice them, all we see is the glittzy people who like to wave their label in your face