Phineas and Ferb creators spill the secrets of "Squirrels in My Pants" and the shows other beloved songs

Phineas and Ferb got the band back together, debuting Season 5 on Disney+. To celebrate, creators Dan Povenmire and Jeff "Swampy" Marsh visited Mashable for a Say More interview, which dove into the trials of the show's creation, the hilarity behind their platypus details, and their favorite songs from the series.

In this clip from the full interview (now available on YouTube), Entertainment Editor Kristy Puchko asks Povenmire and Marsh to reflect on the unexpected popularity of "S.I.M.P. (Squirrels in My Pants)" — which became a popular TikTok meme — and how it's affected their approach to Season 5. "The things you think are going to click," Marsh began, with Povenmire finishing the thought, "Are not always the ones."

"'Squirrels in My Pants' is the biggest example," Marsh explained, "When we wrote that, we thought, 'Well, it's funny. It works for the show. It has no life outside of this format. And yet that's the one."

Beyond sharing their surprise to the ongoing love of "Squirrels in My Pants" — and the surprising places it has popped up — the pair also revealed fun facts about other Phineas and Ferb bops like "Gitchee Gitchee Goo," "Summer Belongs to You," the Perry the Platypus theme, and the opening theme song performed by Bowling for Soup.

For more on Phineas and Ferb from Povemire and Marsh, check out Say More's full interview on YouTube. 

How to watch: Phineas and Ferb Season 5 is now streaming on Disney+.