Josh Duhamel has dismissed kissing his female co-stars as just a "perk of the job".
The Transformers star has locked lips with Katie Holmes and snogs Katherine Heigl in Life As We Know It, which opens in UK cinemas on October 8.
"It's just one of the perks of the job - Katherine was like, 'You were making out with Katie Holmes in your last movie? Excuse me, I'm already jealous'," he told Parade.com.
"Personally, I'm a big fan of Katherine's husband, Josh Kelley, so kissing her in Life As We Know It was like indirectly getting to make out with him. Just kidding. But Josh didn't come around to the set during our big lip-lock. Katherine says he's never there when she has to do a make-out scene."
Josh also has no qualms about stripping down to his undies for the film's poster.
"I didn't mind stripping down. The director said, 'I think it will be funny but it could end up on the Internet.' He didn't mention the poster," he quipped.
"But I have no pride. Whatever it takes. I'm about as unsexy as you can look in a pair of underwear and high-top shoes. I just look like a bigger version of the baby."