I am also experience hourglass penis from time to time.I have a theory, but not sure.I noticed other people as well as myself, get this shape after and just before taking a shit, when it’s cold, or going from flaccid to erect before evening out.I noticed I started getting it bad right around the time I started kegel’ing.is it possible for you PC muscle to tense up and cause this restriction.cause I know the anus tensing up when taking a shit can cause this.also when you colder I would imagine the muscles seizing up, especially if there in shape from kegeling.anyone have any thoughts on this?