Dry sperm is dead sperm so nothing happens.
It is possible, but unlikely to get pregnant from sperm on your vagina.
No sperm in the butt does not cause diareah but the penis being pushed in there may
Yes, it doesn't matter how the sperm get inside the vagina. If it's in it can get you pregnant.
Yes, You have to sperm into something then put it into a girl
Yes, sperm lives for 3 days and they will swim the hold way if they get close to the vagina.
If he has reached Puberty then he will be able to shortly if not already. It makes no difference if he is a virgin or not. Sperm doesn't always shoot out though, sometimes it just dribbles out.
Yes many can whether he is a virgin or not makes no difference once a male start producing sperm and semen he keeps on doing it for the rest of his life.
No, sperm production begins automatically around puberty, regardless of sexual activity. Even a forty year old virgin will actively produce sperm.
Yes, because it contains sperm