I dunno. I guess I'm old, because I'd trade the sex for just an enjoyable evening out, doing something interesting and cool with a person I found attractive. If there were a spark, then we could see where it goes, but ultimately, sex motivated solely by animal lust is sweaty, sloppy, and generally unfulfilling.
After a quarter-century of being sexually active, I can tell you that with one exception (and she was the singer in a little-known scottish punk band in town for a concert), one-night stands and other slightly longer relationships based solely upon sex always left me... disappointed.
But candidates for an enchanted evening?
Salma Hayek
Angelina Jolie
Jennifer Connelly
Rachel McAdams
There are plenty more, but generally the criteria is a) have a brain, and b) be brunette.