A girl lives in a cottage in the woods. One day there's an urgent knocking on the door.
"Hello" says a bloke in a purple cloak. "I'm a wizard and I was walking past and I'm desperate for a slash. Could I use your toilet?"
The girl agrees. A few minutes later the wizard comes out, looking distinctly calmer.
"That was great" he says. "As I'm a wizard, I'll grant you a small wish - whatever you like?"
The girl thinks. "Well, I've always wanted bigger boobs. Can you help?"
The wizard thinks, reaches into his magic bag and produces a potion bottle. "Rub this on your boobies and say aloud the spell 'OOBY SCOOBY DOOBIES, I WANT BIGGER BOOBIES'. You'll see a small increase over time. Keep at it, they'll be humungous". And with that he disappears in a puff of smoke.
The girl goes in the bathroom and rubs a bit of the potion in. 'OOBY SCOOBY DOOBIES, I WANT BIGGER BOOBIES' she says. Sure enough there's a very small, but perceptible increase.
This goes on for days. Some of the potion, and 'OOBY SCOOBY DOOBIES, I WANT BIGGER BOOBIES' and they're getting larger and larger.
Feeling great, she decides to treat herself to a new set of lingerie to reflect her changed size. She's sat on the bus and decides to use the last of the potion, and shout out 'OOBY SCOOBY DOOBIES, I WANT BIGGER BOOBIES'.
A bloke hears this. "Excuse me miss? Did you have a wizard in a purple cloak stop at your house and ask to use your toilet?"
The girl is amazed. "Yes I did, how did you know?"
The bloke says "HICKORY DICKORY DOCK".
