A girl goes into the doctor's office for a checkup.

As she takes off
her blouse, he notices a red "N" on her chest.

"How did you get that
mark on your chest?" asks the doctor.

"Oh, my boyfriend plays football at Nebraska and he's so proud of it
that he never takes off his Nebraska sweatshirt, even when we make
love," she replies.

A couple of days later, another girl comes in for a checkup.

As she
takes off her blouse, he notices a orange "T" on her chest.

"How did
you get that mark on your chest?" asks the doctor.

"Oh, my boyfriend plays football at Tennessee and he's so proud of it
that he never takes off his Tennessee sweatshirt, even when we make
love," she replies.

A couple of days later, another girl comes in for a checkup.

As she
takes off her blouse, he notices a purple "M" on her chest.

"Do you
have a boyfriend at Minnesota?" asks the doctor.

"No, but I have a girlfriend at Washington. Why do you ask?"