This is really helpful.
Here’s my personal, textbook case of smooth muscle fatigue, for the record:
3 weeks or so into PE (newbie routine: 1 on, 1 off), I skipped my usual rest day and did 2 in a row. The day after, I tried to go again, but couldn’t get an erection.
The day after *that*, I tried to go *again* (with thoughts of willpower and persistence in my head), but after my warmup noticed:
1. My flaccid was bronze-ish all over, and dark (a cold colour, almost blueish) where the skin bunched up,
2. The glans and inner foreskin (I’m uncut) were sickly pale and flecked with red veins, and
3. Overall, the whole penis felt hard, like overcooked pasta.
Figuring this might just be what PE feels like (and full of uneducated enthusiasm) I forced myself through my routine that day.
For the next three days, I couldn’t get an erection (I normally get several per day), and generally felt awful. People commented on it. I’m not sure if the overtraining caused the general feeling-bad, but it sure utterly killed my EQ.
I took 5 days off and recovered, then got back on the routine when my EQ came back - it’s been almost two weeks now and my EQ is way, way up (much better than before PE).
From now on, I’ll only do PE routines when my dick is “asking for it”, I think.
So, lesson learned: a hard, discoloured flaccid is best left alone, and PE (generally) shouldn’t make your dick unhappy. For me, anyway.