Charlie Sheen says John Mayer's Rolex lawsuit has nothing to do with watches and everything to do with Charlie Sheen.

The Anger Management star tells TMZ that it was an act of retribution stemming from when Charlie bumped John off the cover of Rolling Stone magazine in 2012.

Charlie explains that watch broker Bob Maron convinced Rolling Stone that Charlie would make a better cover model than John, and the singer has been bitter ever since.

Now he's suing Bob, who also manages Charlie, over fake Rolexes.