Actress/model Jenny McCarthy was mortified when an unwelcome digestive problem killed the mood at an autograph signing during her Playboy days.

The former Playmate tried to ignore her illness in the company of her male suitors, but even skimpy clothing couldn't maintain her sex appeal following an impromptu mess.

She says, "Well, I once had really bad diarrhoea at a PLAYBOY autograph signing. I was squeezed into a tight red dress, dripping in sweat, and knew something was not right. I just kept having my picture taken with the fans. But then I was like, 'Oh no, the demon is about to be unleashed.' And it was unleashed for about 20 guys to witness.

"I knew at that point in my career all I was supposed to do was turn men on, but just ended up grossing them out."