Both classical and operant conditioning are clearly in play when it comes to porn usage.

Operant conditioning is a theory and method about how people change behavior. It's based on the idea that people do thing that bring pleasant results and stop those that don't.

The most important thing to remember is that classical conditioning involves automatic or reflexive responses, and not voluntary behavior (that's operant conditioning, and that is a different post).

Operant conditioning is different to classical conditioning, and it focuses on using either reward or punishment as an incentive to increase or decrease the presence of certain behaviours.

Gregory Razran, Operant vs. Classical Conditioning, The American Journal of Psychology, Vol. 68, No. 3 (Sep., 1955), pp. 489-490 ...

Pavlov's dog experiments played a critical role in the discovery of one of the most important concepts in psychology: Classical conditioning, sometimes called Pavlovian conditioning.

That said, both classical and operant conditioning are clearly in play when it comes to porn usage. Classical Conditioning Classical conditioning is learning through association.