Three college girls went in for physicals,

Upon examining the first woman the Dr. notices she has a large letter 'H' imprinted on her chest. The Dr. asked her "how did you get this?"

She says "my boyfriend is from Harvard, he likes to leave his letter sweater on when we make love."

While examining the second woman the Dr. notices she has a large letter 'Y' imprinted on her chest. The Dr. asked her "how did you get this?"

She says "my boyfriend is from Yale, he likes to leave his letter sweater on when we make love."

During the examination of the third woman the Dr. notices a large letter 'M' imprinted on her chest. The Dr. says "I see your boyfriend is from the University of Minnesota!"

She responds "No, my girlfriend is from Wisconsin!"