Ashton Kutcher has encouraged men to explore their sexuality by “kissing a dude”.

The Two and a Half Men star discussed his numerous kissing scenes with co-star Jon Cryer on Conan this week.

The final season of Two and a Half Men featured a storyline in which the pair’s characters entered into a sham same-sex marriage to make it easier to adopt a child.

Speaking to Conan O’Brien, Kutcher said: “Jon’s my second male kiss on screen. My first one was in ‘Dude, Where’s My Car?’

“Here’s the thing… if you want to know if you’re not gay, kiss a dude. If you feel nothing, you know.

“While Jon’s a wonderful human… there was nothing.

“It was weird because he had a little stubble, and now I understand the issue with the stubble. It’s a little scratchy and itchy.”

The show’s executive producer previously said of the storyline: “No offence is intended, and I hope none is taken.

“We’ve always been somewhat of an offensive show, so it wouldn’t surprise me if this is going to be offending people. We can’t go out with dignity, because we’ve never had any.”

Watch the clip below: