A girl had devised a device to cause any car that passed in front of
her house to suddenly break down but couldn't find any practical way to
profit from it. So, thinking clearly, she set up the device, and as the
cars passed the house and broke down, she'd offer the man in the car a
place to stay for the night. Then, as soon as the man was asleep, he'd
be jarred awake by her with his penis in her mouth, and she'd hold a sign
up saying "$50 or I'll bite hard!" Of course, usually the guy would pay
and she'd let him go.
Well one day a Newfoundlander broke down, and had to stay the night.
Sure enough, he felt something between his legs at night, and there she is
with him in her mouth and holding the sign, "$50 or I'll bite."
The Newfoundlander just smiled and said "$100 or I'll piss!"