I'm not sure why a lot of people feel the need to cut out sex as well. Sex is a natural and normal part of a healthy sex life. The porn and masturbation is what causes the problems, I rebooted with my girlfriend and the sex was actually a huge part in helping my recovery and helping me shift away from the porn that was desensitizing me and giving me PIED to the point where at one point I wasn't even capable of having sex.