Evils of Marijuana
A certain Oxford Uni professor was known for getting off topic during lectures. His favourite off-topic subject was "the evils of marijuana".
One day into his lecture he started talking about weed and it's impact on society and that's there always victims, "Used regularly," he explained,"pot can cause psychic disorientation, sterility, cancer and castration!"
Now wait a minute, Professor," interrupted Nailit. "Castration? Now that's absurd and somewhat rich!"
"Yes young man, it's sadly true," replied the professor smugly. "Just suppose your girlfriend gets the munchies!"