ExtremelyNo not all the time. If you watch gay porn and you still like the opposite sex than you are not gay.
Not necessarily, you could be curious if its a recent thing you are doing. You could be bisexual. It depends on if you just watch it or whether you get turned on by it and want to be involved in it...
Yes.
no it will help you find ou that to do if you are on your own playing with yourself
No, of course not. if you are gay you like guys, or girls like girls. that is the only reason.