In a way, sex IS a skill like sport.
I don't think that sex between two or more people is perfectly analogous to sport, but there are some commonalities.
One thing: practice, Practice, PRACTICE! (Practice, in my experience, doesn't make perfect, but it does help...and practicing sex is one of the few practice events that are enjoyable for everyone involved -- regardless of what's learned or instilled...)
Another thing: Watch the tapes. (This boils down to research. It sounds boring, but watching your spouse/SO/friends/etc., watching other couples/threesomes/etc. live, reading books like 101 Sex Positions, The Orgasm Bible, Tickle His Pickle, The Complete Idiot's Guide to Amazing Sex, Art of Oral Sex, etc., and searching the Internet for sex advice can broaden your horizons. By the way, I picked out the book titles with a short search on Amazon.com. And now I want my pickle tickled.)
And another thing, do you both want to be sexually satisfied?: Pay attention to what your "opponent" is doing and react accordingly. (Please be assured that I don't think that the male/female encounter is a combat, but I'm thinkin' that reacting to the present sex partner's signals are important. I'm sure I miss a lot of signals in the heat of the moment, but this is a reminder to keep me "in the game.")
If something your partner is doing is doing it for you, it really helps if you give encouraging words to your partner(s) to continue ..THE...EXACT...THING...THAT...YOU...ARE...DOING!.
If you are the thrustee and keep quiet, then the thruster assumes things are going well. If you are the thrustee and are happy (or even unhappy) with the current...um...proceedings, then telling the thruster could open a window to other possibilities. For example, is grinding preferable to long thrusts, or short thrusts, or is a combination needed here?
It boils down to being aware of your capabilities and your sex partner's (or partners') needs, and counting on the honesty and comfort of your sex partners.
Okay, that's too much being serious for me. It's WAY past dinner time!
Thrax