The acronym rice stands for
a. rest, ice, compression, elevation.
b. reduction, injury, communication, explain.
c. relaxation, immobilization, care, exercise.
d. restriction, instruction, cpr, equipment.

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.  

the answer is false, i know this answer is late but its for anyone else that needs it.