Why do some gay guys ume just cuz another guys gay that theyll like him?

When newly closeted guys come out at my school they get my number and ask me for nude pics within the first hour of talking to me and then say we should go out but..well like the title says just cuz someone else is gay why would you expect them to date you without knowing them at all? I find this a very trashy attitude and most of the time ive said no,has this happened to any of you? :S why can't there be a polite guy with morals for once that wants to get to know me first and have more then one date before ? ughh