I don’t if there exact definition of pfs but I sure the hell suffered a great deal. I went from no problems and regular sex to almost being able to do nothing overnight.
I still remember when it happened. I was having sex with my then gf and it going limp. That had never happened. After that it was 5 years of frustration. I Could hardly/not at all get it up, could not feel my penis when flaccid, discomfort when I did cum, lower volume of ejaculate, etc.
I wish I could tell everyone the magic formula for recovery but I can’t. I took 5+ years to start to be normal.
I am normal now.