Jennifer Aniston had best cover her ears – her boyfriend John Mayer has revealed he once had a night of passion with a groupie.

The Wonderland singer, who is currently dating the Friends actress, insists the tryst happened years ago and he'd never fall for a fan again, because modern technology has left him too scared.

Mayer says: "I might have hooked up with people, but as soon as we hooked up, they weren't fans anymore."

He adds: "(I haven't done it) in a really long time, not since the camera phone! I'm not trusting enough to really open up to anybody I don't know very well anymore."

Is John telling the truth? He is after all a compulsive liar.