Johnny is on his way to school when he comes across a frog. With a sudden inspirational thought, he picks the frog up, shoves a firecracker up the frog's arse, lights the cracker, and blows the frog to smithereens.
Now at school, the teacher asks the class: "Has anybody got anything for show and tell this morning?"
Johnny waves his arm in the air and is virtually screaming "Me mis me mis me mis".
"Ok Johnny, what do you have to share with the class today?"
Little Johnny then says, "Well on my way to school today I shoved a cracker up a frog's arse." The teacher interrupts and says, "It's not arse Johnny, It's rectum."
Johnny then says, "Fucking oath it wrecked 'im."