Nocturnal woodies are a normal function of REM sleep.
You’re suppose to be having them.
That said, other factors can play a part in NOT getting a night sleep woody.
Such as ED, medications, mood disturbances, exhaustion, cardio vascular health, etc.
This topic has been widely discussed in related health & medical circles.
(and around here)
The return of good morning wood was one of the first benifits I experienced as a result of PE.
I hadn’t had GMW in over ten years, probably closer to 15. Now I get it almost every morning.
After all the PE’ing, the morning wood freaks me out sometimes. But it’s a good thing.
I think the lack of MW had to do with my smoking, stress level, and my shitty sleep habits.
AND my massive coffee consumption. (this was probably #1)
So in that respect the lack of MW could be considered an indication of other issues.