A flasher wearing a French maid’s outfit exposed himself to two teenage girls.
The 14 and 15-year-olds were walking on the A162, between Brotherton and Byram, near Selby when the man lifted his skirt to expose himself, police said.
PC Nicola Gill, of Selby Safer Neighbourhood Team, said: “Due to the way the man was dressed I believe he was either on his way to fancy dress party, or on his way home from one.
“Although he did not approach the girls, they were naturally left very shaken by the incident.
“His behaviour was disgraceful and something we will not tolerate. If you have any information which could help to identify this man, you should contact the police straight away.”
The incident happened at about 8.45pm on Saturday.