Joshua Jackson Says Girlfriend Diane Kruger Prefers Him 'Schlubby' for Sex Scenes

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The Affair star Joshua Jackson dished to Ellen DeGeneres about what his girlfriend Diane Kruger thinks of his steamy sex scenes on the Showtime drama.

While Jackson admitted that he doesn't actually watch the episodes with Kruger, he felt like he has a good idea of what she would like him to appear while embracing another woman on the small screen.

WATCH: Joshua Jackson Reveals How Diane Kruger Handles His Steamy Sex Scenes on 'The Affair'

"She wants you to look like you're sexy," DeGeneres speculated.

"I think she's a little conflicted on that," Jackson said. "She's OK if I look a little schlubby ... Keep the good stuff at home."

Last month, ET caught up with Jackson at the Miss Golden Globe event where he said having a girlfriend who's also in the business has made his job easier.

MORE: Diane Kruger on Sexism in Hollywood and Working With Husband Joshua Jackson

"The show might be steamy, but it's so tremendously dysfunctional that I don't think she feels threatened by anything that's happening on camera," he said. "Thank God she's an actress as well so she understands."

"I think it would be very difficult to be with someone who wasn't in the business and trying to work with material like that," Jackson continued.

Ironically, the only time the couple has shared the big screen together they were playing characters with no chemistry in Sky. Back in September, Kruger told ET the task was easy after seeing Jackson's altered appearance for the role.

MORE: Joshua Jackson Refers to Diane Kruger as 'My Wife'

"When he stepped out of the trailer, I knew we were OK," Kruger said. "He'd been growing this beard for about three months and then shaved it off for the mustache. I told him he had to shave it off before he came home!"

The Ellen DeGeneres Show airs weekdays.