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So this lovely young co-ed goes to the doctor for a checkup. After she gets undressed, the doc notices the outline of a large "M" across her torso.
Dr.: "What is that?"
Co-ed: *giggling* "Oh, my boyfriend goes to the University of Michigan. Whenever we make love he likes to keep his varsity jacket on."
Satisfied, the doc lets it go. The next day, another comely young co-ed comes in and gets undressed. He sees another "M" across her front.
Dr: *chuckling* "I'll bet your boyfriend goes to Michigan, right?"
Co-ed: "No, but my girlfriend goes to Wisconsin."