Why? Why? I do not know if I can answer why, but here is the “what”
What is Ball Tapping:
It is the act of slapping, kicking or punching a man’s balls in a joking (but painful manner).
It seems to be a popular trend in many schools and on sports teams.
Recently it was reported that it is a very popular trend in Indiana and in a school nurse nationwide survey, nurses all over the country are reporting that many boys are coming in with injuries.
It is causing many problems with the male reproductive system. Boys who play seem to understand this and say, “ya it causes shooting darts”.
Shooting darts When a male’s sperm is infertile. Usually caused by excessive ball tapping, punching, and kicking of the testis.
Why Ball Tapping?
When speaking to teen boys, many of them see it as harmless fun, an alternative to ‘arm punching’ or ‘Indian burns.’
Check out some of the ball tapping entries on Urban Dictionary, which seems to have both negative and positive connotations: