Philadelphia police are hunting for a man who drives around without any trousers and offers women money to watch him masturbate with slices of cheese.
The so-called 'Swiss Cheese Pervert' has approached a number of women in the Mayfair area, prompting the police's Special Victims Unit to investigate.
A post on the Facebook page of Mayfair Town Watch said: "Good Morning Mayfair! Please be aware of the Swiss Cheese Pervert! This individual is driving around surrounding communities and exposes himself to women.
"He offers them money to watch him put swiss cheese on his privates. He is a white, heavy set male, 40-50 years old. He drives a newer model silver sedan.
"He was also spotted in a black newer model sedan. If you see this guy, don't confront him. Get his plate number and call 911 immediately!!! We have passed all the information to the 15th PD."
Other reports claim the same man has been sending messages on OKCupid asking women to "perform masturbation on him with cheese".
The Philadelphia Daily News obtained what is alleged to be an excerpt from one of those messages.
"I started to compare girls to cheese due to their milky complections [sic], girls are soft, smooth feeling and tend to like dairy products more. That and typical advertising, always using a girl to advertise dairy products. So cheese is what I started to use as a replacement for having sex with girls."
Authorities are keen to point out that although the incidents may initially appear comical, it is in fact a serious offence and traumatic for those unfortunate to be approached.