See, Shani, at least in my last two relationships the sex was rather awesome anyway, so maybe I'm not ACTUALLY missing out on the "hot, sweaty, monkey love" after all.
The sex I've had in casual situations hasn't really been that awesome. Maybe I've just gotten lucky with the mindblowing sex, but the guys I've had casual sex with have relied on me to drive the situation and haven't been very skilled (imo, especially the dentist I slept with on Saturday.. not a good kisser, even. bleh), and it just leaves me craving someone like the last guy I was in a relationship with. /wistful sigh
The connection and the trust really help, and I'm far more open in terms of sharing fantasies/sharing when I'm horny with someone I'm in a relationship with. Long distance almost makes it easier to share those things, because there isn't any everyday, mediocre sex to fall back on. Words must be shared, and sometimes that can be really hot.