"There's always that fallow period in any actor's life," he explained. "My most proud moment in that phase of my life, I worked behind the camera on some special projects – as a set dresser. So I would move all the props around. It was sort of on the low end of the Hollywood spectrum."
Asked which films he worked on, Jon drew a blank.
"I don't remember them having titles," he joked. "They were the kind of movies that would appear late night on Cinemax."
"There's a certain amount of nakedtivity in these, isn't there?" David asked him.
"There's a certain amount of nudeular activity, yes," Jon answered.
Related Content from AccessHollywood.com:
VIEW THE PHOTOS: The Men & Women Of Late Night Television
PLAY IT NOW: Dish Of Salt: 'Mad Men' Season 3 Premiere
PLAY IT NOW: Access Extended: Jon Hamm Talks 'The Day The Earth Stood Still'