A little boy is walking down the road dragging a flattened frog on a string, he walks up to the local brothel and taps on the door
The madam answers and he says to her "i want to have sex with your dirtiest girl, who has lots of diseases, ive got £500 to spend"
The madam's eyes light up and says "That will be me then, but why do you want a disease?"
The boy said "Tonight after my mum and dad leave, my babysitter will shag me because she likes cute little boys, later when dad runs her home he will shag her in the layby. When he comes home and goes to bed mum will want a good seeing too and tomorrow when dad goes to work, mum will shag the milkman and he is the barsteward who ran my fooking frog over"