Sarah Silverman 'admits spanking fetish'

Sarah Silverman has admitted her new boyfriend spanks her.

The comic, who announced that she is dating Family Guy writer/producer Alec Sulkin, revealed on The Late Show with David Letterman that her mother knows about her fetish because she saw the hand-shaped bruises.

The 39-year-old said: "You know what's great about parents is that when you get famous you can do anything you want and they can't do anything about it."

Silverman said that while she and her mother were in the bathroom, her mother yelled in horror, "Sarah, what is that?"

The actress added: "I looked in the mirror behind me and noticed that on my tushie is a bruise the exact same shape of a hand. And I was able to just say, I'm sleeping with a man that spanks me."

The third season of The Sarah Silverman Programme is currently airing on Comedy Central.