A young college woman went to the doctor because she had a strange, "I" shaped mark on her chest.
The doctor took a look, then asked what college did her boyfriend attend.
"Illinois", she replied.
"Well tell him to remove his college shirt next time you're having sex."
A few days later another college woman came to see the doctor about a large "O" shaped mark on her chest.
"What college does your boyfriend attend?"
"Oregon", she replied.
"Well, tell him to remove his college shirt when you're having sex"
The following week another girl came, with a large "W" shaped mark.
"Don't tell me,", said the doctor. " Your boyfriend attends Wisconsin college.
"Oh no." She replied. " Michigan".