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

A girl goes into the doctor's office for a checkup. As she takes off her blouse, he notices a red "H" on her breast "How did you get that mark on your breast?" asks the doctor. "Oh, my boyfriend went to Harvard and he's so proud of it that he never takes off his Harvard 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 blue "Y" on her breast. "How did you get that mark on your breast?" asks the doctor. "Oh, my boyfriend went to Yale and he's so proud of it that he never takes off his Yale 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 green "M" on her stomach. arrr he says "Do you have a small boyfriend at Michigan?" "No, she replies he is normal height and goes to Wisconsin. Why do you ask ?