My ex boyfriend used to be addicted to masturbating... Throughout the duration of our six year relationship. We rarely had sex. It greatly affected my self esteem.
Now I am in the industry myself... ironic... He actually urged me to get into it.
Despite this he still loved masturbating and the fantasy as opposed to real sex because he said it heightened his arousal and he could control his orgasm and get that pleasurable feeling for a more extended amount of time.