Orgasm Help?

I can't orgasm. I've had a few different sexual partners, I've masturbated, done it when stressed, done it when relaxed. I've heard it feels similar to peeing but still haven't felt anything similar.

Mind you, I haven't done this horribly long (actively having sex for about two years now) but I've been able to please people quite well just have never had the same orgasmic experience in return, no matter how giving my partner is.

Any ideas?