A little boy called comes into the kitchen one day and says to
his mum, "Granny's got a prawn!"
The mother says, "What on earth do you mean?!"
The boy takes his Mother into the front room and shows him Granny, stark naked asleep on the sofa.
He points to Grandmas vagina and says, "Granny's got a prawn!"
His mother whispers, "That's your Grandmother's vagina son!"
To which The little boy replies...."Well, it tastes like a prawn!"