(U-WIRE) IOWA CITY, Iowa ? University of Iowa freshman Tana Sanders awoke two weeks ago to an unusual belated birthday gift: a man in black leather chaps, a vest and a thong. Problem is, no one ordered a stripper. That's why University of Iowa police were looking for a man who has reportedly offered private shows to female students in the residence halls over the past three weeks. The man ? white, in his mid-20s or early 30s, with a red crew cut and goatee ? claims he has been hired to perform for their birthdays, police warned. They said the suspect has always arrived at residence hall doors around noon ? sometimes setting up appointments, other times appearing unexpectedly.

In Sanders' case, the man arrived in the middle of her nap, so her roommate answered the door. When her roommate agreed to let him in, he excused himself to change out of his "normal clothes" and came back wearing the chaps and a black thong, Sanders said.

Sanders, confused and drowsy from her nap, asked the man who had hired him. The stripper said a friend, but wouldn't elaborate. Sanders then offered a name, and he quickly said, "Yes, that's who hired me," according to her account.

The stripper, who called himself Kevin, then sat Sanders in a chair in the middle of the room and gave her a lap dance. Sanders said she felt "extremely" uncomfortable, especially when he started to touch her chest and lick her. She gave him what she described as a horrified look, which prompted him to ask her if she was "officially embarrassed." Sanders quickly replied yes, and the stripper left.

Afterward, Sanders said she went from friend to friend looking for an explanation, but none had ordered the stripper.

University of Iowa police Capt. Larry Langley said Wednesday the department had completed its investigation and could not determine whether the man had broken any laws. In all, three women allowed him into their dorm rooms, and the man left when asked, he said.

Kate Fitzgerald, a University of Iowa assistant director of Residence Life, said the university knew about the incidents but did not feel the public was at risk. She did, however, warn that students should always check their peepholes and use caution when letting people into their rooms.

"Unfortunately," she said, "the university does not have a policy against stripping."