The writing team behind The Simpsons likes to throw in a joke or two related to video games now and again, and another gaming-related gag appeared in last night's new episode of the series, "That '90s Show". Told as a pre-marriage flashback set in the 1990s, the story centered around Marge attending Springfield University while Homer created grunge music. At one point Homer encourages Marge to push their mattresses together for a snuggle, but is thwarted when she reveals that she's saving such activities for marriage. Homer says he understands and that they should follow the example of a celebrity role model. Cue this billboard of Sonic the Hedgehog proposing to Amy Rose with a gold ring. Comedy gold!