Sharon Osbourne insists her sex with Jay Leno only lasted ''a second''.

The 62-year-old star recalled the raunchy session with the former 'Tonight Show' host - which happened when she was 25, before she married rocker Ozzy Osbourne - wasn't a pleasurable experience because it didn't go on for long enough.

During her appearance on 'The Howard Stern Show' earlier today (09.12.14), the host encouraged the 'Talk' presenter to speak about her fling with Jay, who is now 64.

He said: ''Talk about when you had sex with Jay Leno, go ahead! I love that story.''

She then quipped: ''Well it only took a minute, so I'll just say, it took a second, that was it.''

And when asked if she had found it a pleasurable experience, she replied: ''F*ck, no, it wasn't long enough,'' appearing to refer to the length of the sex session.

But after giving those details, Sharon - who married Black Sabbath frontman Ozzy in 1982 - insisted she couldn't remember anything else because it was ''so f***ing long ago''.

Sharon - who has three kids, Aimee, 31, Kelly, 30, and 29-year-old Jack with Ozzy - made the headlines last year when she revealed she and Jay had a fling more than 37 years ago when they were both single.

Speaking in September 2013, she said: ''One thing led to another. He came to my house and met me and then we had a little fling.

''The fling was more fling for me and not fling enough for him.''

After Sharon made the news of their short romance public, Jay also spoke about it later that month and claimed the former 'X Factor' judge called him ''every night at midnight for an hour'' after getting his phone number.

He recalled: ''This happened when we were both single. What happened was, she had seen me at The Comedy Store, I had never met her, and she got my phone number, and she called me every night at midnight for an hour.

''She was just calling me, but she didn't say who she was. But she had this British accent, and she was really intelligent.''