The egocentric and eccentric Regan Senter (am I missing the play on words here?) puts "aspiring models" through the industry paces with little interest or regard for the viewer's sexual satisfaction. Why go to the extent of oral/vaginal penetration if completion is of little importance? The aspiring porn stars pull off the rigidly instructed posturing with a maximum of grace, but it results in a minimum of erotic value.
Imagine yourself doing the dishes: this is how interested Regan is in these potential up and comers. Still, of novelty value for the sheer tedium.