I recently had an "enforced" period without PMO, about two weeks. I was on a trip in close quarters/sharing rooms with others, and didn't have the privacy or access to porn. However, it was not a porn-free trip, in that I carried my fetish fantasies with me in my head. So regularly, say at night or while dozing in the back of the car, I'd allow my fetish fantasies to take off and give myself an erection, which felt good even if I couldn't masturbate. I now realize that probably wasn't reboot time at all, since I was still reinforcing the porn pathways in my brain.