A thirty year old man visits his doctor for the first time in a decade. The doctor opens up his file and notes that the patient has never undergone a physical. He asks the patient why this is the case. The patient simply informs the doctor that he is a nihilist and believes in nothing. The doctor tells him that he cannot in good conscience continue to be his physician, citing the lack of a medical history. The man gets up, drops his pants, and reveals the remanants of a castrated penis.
"No colds, no flus, didn't drink, didn't smoke, regular exercise, semi-regular sex, but my ex-girlfriend gnawed off my penis."
"Oh," the puzzled doctor replied. "Did she wear braces?"
"Why no."
