Barcelona residents are "fed up" with people having sex in public.
A video has gone viral online which shows a man romping with a woman, who is sitting on a bench in a train station with her legs high up in the air, in the Spanish city.
A bemused commuter is seen walking past the couple, who take absolutely no notice as another group of teenagers giggle and point.
But one unwitting bystander filmed the incident and a friend of the cameraman told Catalan daily El Periodico: "We are fed up with these sorts of situations and that's why we've decided to register a formal protest and go public with it."
Transport company Transports Metropolitans de Barcelona is looking for the couple to fine them for anti-social behaviour.