It seems to me that my first few days of nofap have launched directly into the flatline phase. I haven't had any natural erection. I don't have ED, and I know for a fact if I saw porn I could rev the engine and thing would get going. I feel kind of numb, almost lethargic about the whole thing. What causes the flatline phase? How long does it last typically (I know everyone is different)? Am I in for a huge shock when the flatline phase passes, for example massive urges? Thanks everyone. Just started day 4 of nofap.