A crotch circle is a mysterious and detailed geometric pattern that appears overnight in one's pubic hair. It is not known what causes crotch circles, but some believe aliens are to blame, while others think it is a result of mother nature's forces.
Tom: Babe, you won't believe this... I woke up and there is now a circular pattern with rings in my dick hair!
Sam: Holy shit, that's a crotch circle!
Doctor: Can you tell me what happened sir?
Patient: Ahhhh! It hurts so badly!
Doctor: Calm down and just explain what happened to your penis, sir.
Patient: Carl, that douchebag, snapped off my crotchcicle!
Doctor: How did you get a crotchcicle in the first place?
Patient: Ummm... I was kind of... fucking a snowman.
Doctor: Ohhh, well that's understandable.