Police are hunting a flasher who exposed himself to a young woman on a footpath in Southcourt, Aylesbury.
The man was walking back and forth along Thame Road, the footpath which leads from Churchill Avenue to Penn Road, between 4pm and 4.20pm on Tuesday January 27.
He approached his 20-year-old victim on two occasions and exposed himself, before walking off.
The man is white, in his late twenties, 5ft 11ins, of a slim build and with short dark brown hair.
He was wearing a waist-length navy blue waterproof jacket, black dusty combat trousers and carrying a string bag, which was possibly black.
Anyone with information is asked to contact PC Andrew Melton, of Aylesbury police station, via the 24-hour enquiry line 101.
Alternatively, contact Crimestoppers anonymously on 0800 555 111.