cumslut217: I love the way she's arching her back. It's a dead give away that she's really feeling it. We can fake our voices, our facial expressions. If you want to know if we're actually loving it, look at the small of our backs, our toes, and the contractions of our stomach muscles. Just like you can tell those of us who really enjoy sucking cock by the way our cheeks suck in while we do it.