Basically they're stuck in what feels like a perpetual flatline with basically no motivation, zero arousal/libido, weak erections amongst other symptoms. I've been trying to quit since 2012. Basically I couldnt not get hard at all at one point during the worst. I was fapping by manually stimulating myself and even then it was probably a 30% erection. I conditioned myself terribly in the end. Now I'm getting morning wood albeit it's not frequent and its semi wood but it's something. I think, hopefully, in a few months time my erections will return and then maybe my libido will. Gradually I'm noticing benefits but the process is very up and down and also painfully slow. I was hit with very severe withdrawal symptoms comparable with benzo addicts. Post acute withdrawal syndrome is a real phenomenon that affects severe porn addicts.