Scratch n' Sniff is the sort of story I wish Dr. Who had the guts to do.
I know it's kind of a love it or hate it episode, but I think it has some of the funniest moments of any sci fi TV show ever ("D'Argo, we're in a window..."). The revived Doctor Who has certainly flirted with risqué humor, like with Captain Jack, but I would really love to see a crazy Scratch n' Sniff-like story with the Doctor and friends. He and his companion go to a decadent space version of Ibiza, wake up in a heap after a night of drunken debauchery, and have to solve a weird mystery on the planet while struggling through a hangover. It would be brilliant.
Genetically, paedophiles have more genes in common with crabs than they do with you or me.