When Ellen encountered Ashton – whose modesty was covered by computer pixilation - on her New York set, she asked: "Maybe you want to put clothes on?"
He replied: "Oh, no. Have you seen the ad for the show ['Two and a Half Men']?
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"It's getting a lot of attention, so I just figured I'm going to do everything nude from now on."
In the advertisement for the sitcom, the 33-year-old hunk – who is married to actress Demi Moore – appears in the nude alongside co-stars Jon Cryer and Angus T. Jones behind a billboard they are holding which carries the tagline: "All will be revealed ... 09.19.11."
As well as performing the sketch on 'The Ellen DeGeneres Show', Ashton revealed he is going to buy his wife candy to celebrate their sixth wedding anniversary.
When asked what he is going to purchase Demi as a present for the occasion, he replied: "Candy. It's sort of like a downfall. Right? You go from wood. Wood you can sort of come up with like, creative wood things, but candy? I don't know what to do. It's candy. I am a little lost."