Two Things I Don't Understand

And it involves the gay community. Go figure, right? Ok, here goes...

What's with twinky gay boys taking on effeminate traits? Like if a
guy is attracted to other guys, wouldn't taking on a trait that is
feminine turn him off? What's the deal there?

And by the same token, what's with those lesbian girls who dress like
dudes? Short hair, boy's pants, etc... I don't understand. Can
someone explain these things to me, because I'm stupid...

Thanks.