I want to know whether any of you have solid evidence to support that fantasizing (or mental flashbacks) to real sex is wrong. I'm asking this because it seems like its a little challenging for me to not have flashbacks even in the midst of abstinence. I had a strong desire to watch porn today, but I refrained. I started to notice one good thing i.e. I seemed to have forgotten the visually pleasuring scenes that I craved so much. Yet, I cannot forget the times I had sex, the positions, the memory the sensations and such. Is this a bad thing? And I seem to get moderate erection when I do have these thoughts in my mind.