17 Nipples Riddle

Alright, listen up, you genius. You, who are reading this, are a human person, probably with a normal number of nipples, which is two. The joke makes no sense, but it uses an absurd description of a trash can to invoke a sense of dark humor. It plays on the idea of something normal having something that it shouldn't and the morbidity of a cancer ward. Get it now, dumb dumb?