Jessica Biel tells Letterman about her NEW fear of ‘tubby naked men’ (VIDEO)

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In her first interview since becoming Mrs. Timberlake, Jessica gives David Letterman more information about her wedding than he probably wanted. It wasn’t the boring nitty-gritty details of planning the elaborate $6.5 million event, but rather a shocking visual from a spa getaway beforehand with a girlfriend in the Swiss Alps.

You’d think Dave would welcome any image involving Jessica Biel and one of her hot friends in a steamy spa setting, but not this one…

Jessica said she wasn’t aware of protocol in the unisex sauna, but two husky Austrian men showed her how it was done. As she remained in her robe, the two “tubby” men (as Dave referred to them) walked in and quickly got “butt naked.” But Jessica didn’t stop there, she went into graphic detail about what she saw when she lifted her head… “They weren’t just butt naked, there were balls on wood.”

Dave, who was probably making a mental note to research spa vacations in the Swiss Alps, rolled with the punches asking Jessica, “Is that the criteria to confirm ‘butt naked?’ It has to be ‘balls on wood?’”

Jessica was on the Late Show however not to promote good day spas for tubby fellows in the Swiss Alps, but rather her upcoming film—Hitchcock—which hits select theaters this Friday.