sex machine

noun2

1. •
   Someone with considerable sexual prowess.

   • I said do the bump, huh, I said shake your rump / And stay on the scene like a sex machine — 1970
2. •
   Any machine that is used for sexual pleasure.

   • The typical scenario, Archibald says, is a married guy “who likes building things.” He comes across someone else's sex machine, is fascinated, decides to build one himself. — 2009