Why does coffee make me poopoo?

I took a stimulant pill once. Made me clench my teeth for the next 10 hours, never ate anything and made a list of every shop and whether they support troons or not and drafted a long personalized email to each one about women's rights.

This is what's supposed to happen right?
 
Because you shit at the same time every day and the coffee is a coincidence?
 
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