Weaker prostate maybe
In my situation, I actually had pretty bad PE before finsateride. It’s actually pretty embarressing to say that sometimes i could barely last 1-2 minutes. I even had situations where i’d be on the verge or orgasm before entering. Yes, i was that excited pre finasteride
In the 9 months post crash, i also had PE, though not as bad as pre-fin due to loss of sensitivity. However, when i had some form of temporary recovery around 9 months off, some things change in my body: Coupled with much improved eyesight & digestion (on both i now barely have issues) i can now also last much longer during sex, easily 5-10 minutes. No idea what to make of it, but i think the prostate is heavily involved. I think that this gland is very sensitive and can evolve and change form seemingly overnight and causes some of the genital symptoms we experience