So I just took a bath.
It was an....interesting experience.
Spoiler (highlight to view):
I'd still been having some tension in my urethra, and my genitals had lost a great deal of their pliancy. This meant that not only did I have shrinkage most of the time, erections were slower to recede, even after climax.
Taking the bath, it felt as though my genitals became light as air. It was bizarre to watch - small bubbles formed - and feel the skin rapidly osmose water. It wasn't painful at all...it felt kind of good, very odd. Sat in the bath for about ten minutes - I have serious patience issues. The discomfort is now gone.
Everyone should try it at least once in their life. It's unlike any other sensation.
I just read the Wikipedia article on dehydration. Actually, I had noticed very significant vision loss the past few weeks (enough so that seeing things ten feet away was difficult); I had initially attributed this to retina burn. So I suppose I actually came fairly close to terminal dehydration. Good to know, whether I am one day forced to endure it, or whether I wish to finally end my own life in a manner more classy than jumping into traffic or gripping the third rail.