Anonymous sex.
For all the talk of relationship sex on this site, there's still something oddly satisfying (for me at least) and mysterious and liberating in finding yourself buzzed, drinking another beer at 1 o'clock in the morning and small-talking with an interesting decent-looking cowboy in jeans at the club -- knowing there's a great chance you're probably gonna take this guy home soon for totally non-committal, loose, no-strings, spontaneous, elastic physical release.
Sometimes you don't even know his name. Or you ask his name and forget it by the time he walks out the door.
You learn about yourself and people and life through these late night/early morning anonymous encounters. The early morning sun looks fresh and different rising at 6:30 am on the drive home.