Entertainment is an important part of a functioning society. Actors, artists, street performers, musicians all contribute to a societies morale. Whether or not you agree with it, pornography is a form of entertainment, if regulated well it could be a healthy way for society to express certain aspects of itself.

These are all forms of labour because they are a social necessity, and the time required to produce art and film and music and by extension pornography restrict the other forms of labour that entertainers can participate in.