Teen makes porn with his older parents is a very common theme in threesome scenes. This is because threesome scenes are usually filmed with two people (Older couples have sex three times as frequently as Mature couples do). Most of the time, the porn movie will take place in Europe, which is a continent where most couples have sex at least four times a month. European couples prefer threesome to group sex, they do not like the idea that their partner has been penetrated by more than one person. They would prefer a threesome where two people, usually adults, have sex..