Brenda is preparing a test paper for students in a veterinary science course. She wants an example of a substance that is toxic to horses.

I can't understand what is your question

when you rub, you also apply pressure, that pressure can urge the poop to come out. i think that when your rubbing, you also might be slightly breaking it up and that can further fill the stomach.  

abuse, both physical and emotional. messes with your head. makes you feel like nothing, no matter what anyone else tells you