Jon Hamm’s Hamm Dong has been a major gossip player for several years now. I think we were all aware of Hamm’s business when he first hit the scene, but it was one tabloid story in 2010 which captured everybody’s attention and made The Hamm Dong something really special. In 2010, the tabloids reported that Jon refused to wear underwear under his costumes when filming Mad Men, and his lack of underwear was causing a lot of problems. Now the NY Daily News has a similar sounding story, which actually makes perfect sense because The Hamm Dong has reached critical mass at this point – people are actually looking at his bulge in every photo these days!

“Mad Men” star Jon Hamm’s private parts are causing a stir. Again. An AMC insider tells Confidenti@l that during filming of the sixth season of the hit show — when the ’60s-style clothing was a tight fit — Hamm was politely instructed by a staffer at the network to please wear underwear while shooting his scenes.

“This season takes place in the 1960s, where the pants are very tight and leave little to the imagination,” a source tells us. “Jon’s impressive anatomy is so distracting that they politely insisted on underwear.”

Our insider says that during seasons one and two, AMC’s marketing team even had to do some Photoshop magic on promotional booklets that went out to press in order to make his privates more, well, private.

Especially causing a giggle for the crew were scenes shot in Hawaii, where Hamm lounges around sipping a cocktail in tiny shorts that leave little to the imagination.

“His privates are the inside joke,” says our source, who adds that Hamm “knows what he’s got.”

A quick Google search does show that the actor appears to go commando while not on set. There’s no shortage of images of him strolling down the street looking very healthy.

“Imagine how distracting that would be on the side of a bus or building,” laughed our source. “When the promotional pictures came back the first few seasons, we had to work with them. Everyone was concerned about too much Christina Hendricks boob, but it’s Jon that has the most to show. It’s a good problem to have.”

This season, the network hired popular ’60s illustrator Brian Sanders to tackle the poster task with a paintbrush. In past seasons’ posters, we’ve seen Hamm’s Don Draper both sitting and standing with his back to us. The new season debuts on Sunday, April 7, with a two-hour premiere.

A rep for Hamm said: “It is ridiculous and not really funny at all. I’d appreciate you taking the high road and not resorting to something childish like this that’s been blogged about 1,000 times.”

[From The NY Daily News]

That statement from Hamm’s rep is kind of crazy, right? WHY is it childish to note that the Hamm Dong is swinging in the breeze over and over? People NOTICE it. It’s not like we even have to point it out. And it IS funny – if Jon Hamm wore panties, they would be in a twist. Unfortunately, he does not wear panties so we can talk about it all we want.

Photos courtesy of WENN & Fame/Flynet.