it's normal, at least from my experience. i hypothesize it is related to being vulnerable to predators while stopping somewhere to poop in an unfamiliar environment.

but it sounds like you are also eating something your body doesn't like. for example, before i discovered i was allergic to gluten, i would also poop dozens of small sessions per day. all that went away after doing an elimination diet (systematically introducing 1 new ingredient at a time until you find the problems).