Compulsion

com·pul·sion ( P ) Pronunciation Key (km-plshn)
n.

The act of compelling.
The state of being compelled.

An irresistible impulse to act, regardless of the rationality of the motivation: “The compulsion to protect the powerful from the discomfort of public disclosure feeds further abuse and neglect” (Boston Globe).
An act or acts performed in response to such an impulse.

What compells someone to view something over and over and over again? Why bother if you have nothing to add, nothing to gain?

I wish I knew, I wish I could stop this compulsion.