[mr.miyagi]

A woman was toilet training her son one day and while he was peeing he kept singing, "Peeing with my toothbrush, peeing with my toothbrush." The woman thought this was very strange and asked her son why he called his penis a "toothbrush". Well, he told his mom that one night he walked into the bathroom and his dad and the baby sitter were in there doing something weird. When the boy asked his dad what was happening his dad said, "I am brushing her teeth."