A man goes to the Doctor and says: "Doc, i have a problem, my penis is too big. It is 20 inches long!".
The doctor looks worried and says: "you're right. it's way too big. i'll tell you what you need to do- outside the city in a small forest there is a magical frog. When you find her, ask her if she wants to marry you. Every time she says no, your penis will be 4 inches shorter".
So the man goes to the forest and finds the frog. He tells her: "Hi dear frog, would you like to marry me?".
The frog answers coldly: "not a chance".
immidiatly after, the man's penis loses 4 inches. He goes home but after a while he discovers that 16 inches is still way too much. He goes back to the frog and asks: "will you marry me?".
The frog answers: "No!".
After a whil, unsetisfied also with his 12 inches, the man decided to go to the frog one last time. he asks her: "dear frog, will you marry me?".
The frog answers: "how many times do i have to tell you? no! no! no!".