Yes we lose control of the peripheral nervous system as time goes on. I take narcotics for pain, so that's double trouble, and am only somewhat regular if i eat 6 pieces of toast and drink warm liquids. EVERY day. have tried everything, Sennocot, Stool softeners, bisacodyl products, just make my lower gut sore, but only a good mixture of both water soluble and "long" fibers in the diet, and lots of water help in my case. And KEEP MOVING, exercise is one of those things we parkies want to natually avoid. and force yourself to swallow more (chew gum), we tend not to. this gets peristaltic waves going through the length of the gut, and forces material to move along little doggies! cs