Ananova:

Ozzy Osbourne has revealed he can't have sex with wife Sharon - even after having four Viagra tablets.

According to The Sun he said: "I can't do it. I'm on anti-depressants. I take four Viagra and it doesn't work - it doesn't do anything!

"If I get off anti-depressants I go mad."

He added: "When you first have a relationship, you're like rabbits. We've done it so many times, it's f***ing boring."

Sharon and Ozzy have been married for over 20 years.