Actress Jenny McCarthy went ahead to have a "heart-to-heart talk" with her 11-year-old son about sex as she was worried he would develop a foot fetish.

The 41-year-old beauty decided to give her boy some information about sex after accidentally giving him a confusing message in the past.

She shared: "I just had the birds and the bees talk...I kind of knew it was time because I accidentally told him that sex was like feet rubs. And I looked on his iPad and there were 2,000 pics of foot rubs and I'm like, 'Oh my god, he's going to have a foot fetish for the rest of his life!'

"So I just sat down and had the real heart-to-heart talk with him."

McCarthy, who is engaged to Donnie Wahlberg, said that it was "difficult" having the chat with her son, but she stuck to the basic facts and was happy to leave him horrified afterwards.

"It was difficult ... but being the kind of single mom I've been, I've had to wear two hats and I'm proud to say that Evan will never be having sex for the rest of his life after my conversation," she added to US Weekly magazine.