Is it normal to get no pleasure at all out of sex?

I'm a 22-year-old woman. I've had sex several times with two different guys. Both times were uncomfortable and even painful initially, then settled into slight discomfort....but there was no pleasure at all. None. Even with other positions. Even with oral sex.

I've tried masturbating a handful of times (no pun intended), but the result is the same. My "equipment" just isn't wired to experience pleasure. Is this normal?