"There was a young man" joke

There was a young man in the Air Force who was so well-
endowed that it was bothering his knee. Three Air Force
doctors and one Air Force nurse were in the operating room to
remedy the situation. The first doctor said, "We'll just take a
big hunk off the end." They discussed it and decided that
would affect his sensitivity.
The second doctor said, "We'll just take a big hunk out of the
middle of it." They discussed this, and decided it would change
the texture and feel of it.
The third doctor said, "We'll just take a big hunk off the base of
it." They discussed this, too, and agreed that it might give him
erection problems.
The doctors heard a sniffling, and looked over at the nurse who
had tears running down her cheeks. The nurse cried, "Can't we
just make his legs longer?"