Sorry but I just had to....
....share this.
A German guy approaches a prostitute and Says:
"I vish to buy sex vit you".
"OK, it's £20.", says the girl.
"Goot, but I'm a little kinky."
No problem.", she replies.
So off they go to the girl's flat, where the German produces four large bed springs and a duck caller. "Tie ze springs to your hans und knees." the German demands.
The girl finds this odd, but does as he asks.
"Now you vil get on your hans und knees, und you vill please blow zis vistle as I make love to you."
The sex is fantastic. She's bounced all over the room, honking on the duck caller. The climax is the most sensational she's ever experienced - and it's several minutes before she recovers her breath to gasp:
"That was totally amazing! What do you call that?"
"Ah," says the German,
"four-sprung duck technique."