Having read a story once, certain amnesia victims will read it faster the second time even though they can't recall having seen the story before. They have most likely suffered damage to the:
a. amygdala.
b. hypothalamus.
c. hippocampus.
d. cerebellum.

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.  

yes because there are aliens

not quite sure but i think its