Katherine Heigl found that having to fake an orgasm for her role in The Ugly Truth was really exhausting. In one particular scene, Katherine's character has a When Harry Met Sally moment when her character has an orgasm after mistakenly wearing a pair of vibrating pants to dinner and the control ends up in the wrong hands.

"Oh, my God, it was a nightmare. It was really exhausting - legs dancing under the table and all the tensing-up of the body.

By the end of the day, I felt like I'd run a marathon. No one wants to orgasm 35 times a day."

Speak for yourself there Katherine, we call that a regular old "Tuesday" around these parts.