Hi A.
My opinion is, night wood is a good indicator that NO levels are good and things are on track. I started PE about 4 weeks ago and prior to that had only morning wood stuff. My girl friend can’t keep her hands off it, night and morning now. PE sure sexed us up with gains of 3/4 ” in length Hard and 1/2” in Girth.
Good luck everyone/ Routine here- warm up-stretch 6 min.-warm up-hang 20min (1lb.)-warm up-jelq 20 min.-warm down. Age 66