Does coffee make you poop? what would speed up bowel movements which chemical compound causes that reaction.does it triggers higher stomach acid levels?
I found this: 
"Caffeine within coffee can act as a stimulant, which might induce bile production that increases bowel movements. And some artificial sweeteners, and lactose, may have a laxative effect."

From: https://iffgd.org/lower-gi-disorders/diarrhea/common-causes.html