Baldness

A little boy was eating breakfast one morning and got to thinking about things.

"Mommy, mommy, why doesn't daddy have very many hairs on his head?" he asked his mother.

"He thinks a lot," replied his mother, pleased with herself for coming up with such a diplomatic explanation for her husband's baldness.

Or she was until her son thought for a second and asked, "So, why do you have so much hair?"