A sex (Seks) film is when someone has been video taped while have sex with someone. There are many sex films available to watch on various porn sites. Some sex films will have a man and a woman, some will be two girls, some may be of two guys, some will have multiple people in the films. These sites require you to be a minimum of 18 years old. Some of these sites are free, and some of the sites require that you pay.