yes. it will probably make you seem like "one of the guys" to some boys.
Most guys do
It shouldn't turn guys off as it's something really minor. If you do it on purpose or when you are nervous, try and avoid it at romantic times. It's ok if you are just hanging out and it might even impress him as most girls can't do it. If it just happens without your control, make a joke about it and laugh it off. If you're relaxed about it he's really not going to notice too much.
Some guys may. Most guys don't.
bellybutton
Most guys don't want to be dating a girl drenched in make-up and looking fake. Most guys want a girl that is either naturally pretty or wearing natural make-up
If you are a girl most guys will seem attractive because that's just your hormones and the same goes for a guy.
Most guys do, but some like them hairy and a few don't mind one way or the other. I do think that most guys do prefer them shaved.
most guys tease the girl he likes, so probably
Depends, but most of the guys want comfort from her. One who can listen to him and understand him.
it is pretty much the top of his priority list for most guys, but for those very few guys (like me) that don't really care as much anymore, then it can be lower.
Most 15 year old guys have.
No I don't think most would