Last night on Conan, the It's Always Sunny gang stopped by to plug their 9th season and to give the world a little taste of their 100th episode. Seriously, they've got 100 episodes under their belt now. Ain't bad for a show about a bunch of idiots running a bar in Philly.

In addition to the clip from the show, the guys also discussed with Conan the boundaries of the "gay spectrum" and Charlie Day told a story about the one time Danny DeVito refused to film a scene in tighty-whities and how the gang convinced him to go through with it, anyway. SPOILER ALERT: Charlie Day strips DeVito naked and dresses him in the tighty-whities.