Most women make noise. Don't act like a giant cat at a saucer of milk. Get your whole mouth down there, and concentrate on gently rotating or flicking your tongue on her clitoris. All women hate this. It's about three steps from being dragged to a cave by their hair.
Sperm tastes like sea water mixed with egg white.
Not everybody likes it. When she's performing oral sex, warn her before you come so she can do what's necessary. She'll do all the moving during fellatio. You just lie there. And don't grab her head.