Stepping out of the shower, the man observes to the wife, "Don't you think my penis is a little bigger?"

"You wish!"

He persists, so she looks more closely. She professes not knowing for sure.

The next morning the man insists his penis is getting larger. The wife measures it with a tape measure to set a baseline.

Each morning for a week the wife measures the man's penis, and each morning it is 1/4 inch longer. By the time they can see a doctor, another week has passed. The doctor schedules "surgical intervention" and asks if either of them has any questions. The wife asks, "How long will he need crutches?"

"Why," the doctor responds, "Do you expect he'll need crutches?"

"Well, you are making his legs longer, aren't you?"