Tee Hee Tummy Tums is the 20b episode of the first season.
K'nuckles leaves a piece of candy he stole from the Candy Barrel in a dish to get a free comb from the comb stranger. When Flapjack discovers that no one's ever seen the comb stranger, he decides to wait by the dish all night. The comb stranger turns out to be a man with a bag over his head named Tee Hee Tummy Tums, whom Flapjack accidentally makes drop his candy. He generously gives Tee Hee Tummy Tums his own candy and Tee Hee Tummy Tums takes him to meet his family. He agrees to help Tee Hee Tummy Tums sell combs. The two of them attempt to sell combs to several people in Stormalong Harbor, but the sight of a man with a bag over his face disconcerts people so much that they refuse. Flapjack takes Tee Hee Tummy Tums to Dr. Barber, and he agrees to buy some combs, but only if Tee Hee Tummy Tums removes the bag from his head. It turns out that Tee Hee Tummy Tums is not ugly, as Flapjack suspected, but is actually the most handsome man in the world. But he wanted people to love him for his combs, not his handsome face. People begin pestering him to let them see his face when they see how handsome it is, but he refuses and ends up leaving Stormalong with his family.
The stairs were later seen in Behind the Curtain.
In one part of the episode, K'nuckles stated about getting the bug out of his hair, but he doesn't have any. However, in Gone Wishin, he wished for some hair.