How do us humans know how to poop?

Humans know how to poop due to a combination of biological instincts and learned behaviors. The body's digestive system signals the brain when it's time to eliminate waste, triggering the urge to defecate. This process is influenced by the coordination of muscles in the intestines and the anal sphincter. Additionally, cultural practices and parental guidance teach individuals proper bathroom etiquette and techniques from a young age.