Cayenne and bowel movements

Okay, for the past two days I have been eating and drinking cayenne like it was going out of style and have been thoroughly enjoying myself.

Yesterday my stool was loose, not watery though. Am I taking too much? I probably had about a teaspoon of the 90,000 heat unit kind throughout the day.

Can you explain what is happening in the bowel in response to the cayenne? I'm curious.