Can you tell when your snake is going to...ya know?

My bp has a very full tail, if you know what i mean, and i think hes about to poop! Do anybody else's reptiles alert you to when they're about to go?

my beardie plants his feet and lifts up his tail and he relieves himself, but you can't really tell when a snake is going to poo, I usually don't see them do it thats why.

You usually can't see it, but when you see that thick end of the body before the vent/cloaca you know at some point during that day the snake will go.