How did an orgasm from a prone masturbation session knock me into a flatline?

it can happen whitout quitting porn, flatline is the worst symptom of them all, scary as hell, you need to quit all artificial stimulation and be very very patient.

 

Happened to me, i never heard of PIED at the time, nor for a year after that, but for lots of guys the first sign of trouble is not getting aroused to porn anymore.

 

yes, and then i kept testing if it still works, getting even more anxious, until i just had to go see a doctor.

 

You do not seem to understand what a flatline is or its significance. It says here: https://www.NoFap.com/glossary/

So, it happens during a prolonged abstinence from PMO. Far from being the worst thing, a flatline is a tangible sign that your brain is healing and recalibrating itself from years of overuse/abuse of the reward circuitry to artificial stimulation. It also means that for several weeks you will not be triggered by anything sexual because your sex drive will disappear!

 

Prone masturbation is harmful to the soft tissues and structures of the penis. There is often friction of a rough nature against textiles or hard surfaces. This can lead to desensitization. But this would not occur because of a one-off. If you masturbate prone totally, or even mostly, I urge you to stop. If you feel unable to resist sexual urges, stroke your penis with your hand - flesh against flesh is much kinder than cushion covers, carpets, bedding, laminate flooring or whatever!