The best thing about sex is...?

I admit I've been fairly sexually crazed recently (I can only claim ovulation for a small part of this...haha) and I thought of this question.

Is it the pleasure of orgasm? The adventure of trying new things? The emotional connection? The excitement of pleasuring someone else? The primal energy?

For myself I always think of the physical intimacy, just being able to touch someone else in that way. I mean...I usually don't get to grope males to my satisfaction on a daily basis.

So, what keeps you coming back for more? What is your favorite thing about sex?!?!