1.When anything is said, done, or revealed that causes any chance one might have had with a once-interested girl to fly out the window.
2. When a friend ruins your chances with a girl by hitting on her himself, and using his dick to
knock your cock off course. Even if he is not successful, your
opportunity for procreating will be dashed
on the rocks of awkwardness.
Dick my own cock is acceptable.
Stacy: "Really, you run a dojo? How
interesting. Where is it?"
Steve: "Uhh, my mom's garage."
Bystanders: "Ooh... man. He just dicked his own cock."
Bill: "Hey, Gary, tell Amy here about
that one time you fucked
your cousin!"
Amy: (silent vomiting and departure)
Gary: "Why do you always Dick my cock?