Hoggle: And you wouldn't be so brave if you'd ever smelled the Bog of Eternal Stench. It's, it's...
Sarah: Is that all it does, is smell?
Hoggle: Oh, believe me, that's enough! But the worst thing is, if you so much as set a foot in the Bog of Stench, you'll smell bad for the rest of your life. It'll never wash off.