"This potion tastes like an apple-drop; you'll be able to sort out your housework without distraction. And this potion here tastes like the underside of a muddy basilisk but it'll fix a broken bone in a day," explained the witch.
"Why does one taste so bad?"
"Because if it tasted nice, people might drink it for fun."
"Why would that be a bad thing?"
"Magic trying to fix perfectly healthy bones... has horrifying results."
"Understood."