Despite staring down temptation that could break the strongest of men ... Charlie Sheen did not fall off the wagon at a Playboy mansion party this weekend -- so says, Sheen's XXX wingman Ron Jeremy.
TMZ spoke to the Hedgehog who tells us Charlie -- who recently spent some time in rehab in the wake of his Christmas Day arrest -- was "totally sober" during their time in the house that Hef built.
Ron also tells TMZ, Charlie was smiling and laughing and was overall in a really good mood that night. Shouldn't come as too much of a surprise ... considering Charlie just recently scored the sweetest sentence ever for the Aspen incident involving his wife Brooke Mueller.
Then again, is it even possible to be in a bad mood when you're at the Playboy mansion?