Gene Simmons (character)

Gene Simmons is the singer in KISS.

History
When Marge was pregnant with Bart, she listened to a lot of KISS music. Homer dressed up as Gene Simmons to make Marge feel better.

Non-canon
KISS is a rock group that Marge visited with her friends while she was dating Homer. After the concert, she lost her friends and when she was going to call for a ride, she met the singer Gene Simmons. Simmons asked Marge if she wanted to go out with him and she did. That night, he got Marge pregnant with Bart. In the morning, when Marge woke up, Simmons was gone and had left just his bass guitar. When Marge told Bart this, he changed his last name from "Simpson" to "Simmons".