How big is a dick?

A very rich man declared he will marry only the most innocent girl. Many were interested. But none of them qualified. The man would ask the aspiring girl to come to a room and lift his dress to show his penis.
“What’s this?
The girls, obviously, blushed. This way, they failed the test.
The other day, a very innocent looking girl came for interview. She curiously looked at his penis and said, “Oh, but it’s only a dead mouse.”
The rich man declared the girl as qualified and the marriage was solemnized. On their first night, the man showed his penis again.
“This is not a dead mouse, my dear!” he said, “It’s my dick.”
“No. It’s only a dead mouse,” the girl insisted, “a dick is at least four times bigger, as most of my boyfriends have.”