Women in the High Park area have taken to social media with a warning.
They say a man has been going around at night, exposing himself.
In one case, a woman says a man in a small red car parked on a side street, got out, pretended to jog, laid down on a lawn and exposed himself.
That is just one of several reported cases.
The problem: Toronto Police tell CBC News no one has reported it to police.
They are however, aware of the reports on Facebook.
They're asking anyone who sees something suspicious to call them. If possible, keep a safe distance, get a good description or a photo and licence plate number.