I don't know about ****ty but Aries, Leo and Scorpio are the most sexual signs.
I'd say Libra could be the ****iest, though, since it's a superficial sign known for racking up many a love interest (not hating — I have a Libra moon).
Lol I was searching the exact topic a few days ago.
Anyway, my sign is the ****tiest hands down. (Sagittarius)
And we are one of the best in bed
(From personal experience/people's comments).