Pornography is repetitious to a degree that is hard to find anywhere else in audiovisual culture. Characters, acts, and shots reappear endlessly in films and online clips. Why is this highly predictable material arousing at all? And why are its formulas at the same time detested? This study approaches pornography by exploring its most obvious feature: seriality. Schaschek argues that porn's repetitive formulas are constitutive for the genre as such. She shows that understanding its serial strategies is an important step towards understanding the fascination and frustration that derive from pornography - as a gender system, an industry, and, ultimately, a source of pleasure.