Ozzy Osbourne's longtime former sideman Zakk Wylde has stunned rock fans by revealing the Prince of Darkness has been struggling with performance issues in the bedroom for years.

The Black Label Society rocker recalled an intimate chat with Osbourne a few years ago, when the Paranoid singer told him about his problems.

Wylde tells syndicated U.S. radio show Loveline, "He (Ozzy) goes, 'Zakk, you know, I don't drink anymore, I don't do drugs anymore. I don't even smoke; I never thought I'd give that up.' Then he goes, 'I don't even drink coffee anymore; I'm drinking tea. My schlong doesn't work.' And I go, 'Man, that's messed up!' And he goes, 'Zakk, why am I alive?'"

Wylde also recalled a sauna session with his former boss, during which Osbourne showed him his private parts: "These two chicks came in there (steam room)... and they saw me and Ozzy sitting there. And the chicks go, 'Oh my God, we're sorry', and they just, like, ran away.

"I was just cracking up (laughing), going, 'They probably didn't wanna interrupt our intimate time'. And then Ozz just goes, 'Zakk, look at me. Look at my willy. Look at the state of this... It's a sad state of affairs... You know what those girls were thinking right now? They took one look at this thing...'"