VIDEO: 'It's Always Sunny' guys explain the gay spectrum

Comic-Con-Its Always Sunny in Philadelphia
This publicity photo released by FX shows, from left, Glenn Howerton as Dennis Reynolds, Rob McElhenney as Mac, Danny DeVito as Frank Reynolds, Charlie Day as Charlie Kelly and Kaitlin Olson as Dee Reynolds in Episode 5, "The Gang Gets Analyzed" from the TV show, "It's Always Sunny in Philadelphia," which airs Thursday, November 8, 10:00 pm EDT/PDT. (AP Photo, FX, Patrick McElhenney)

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.