Every time I poop, my penis gets hard. Why am I having this feeling?

Hi there,

It is not uncommon for a person to experience feelings of arousal during or shortly after defecation. This is believed to be caused by the real or perceived sense of relief that accompanies a successful bowel movement.

It is likely that the physical sensations associated with pooping trigger a response in the brain that may manifest in various ways, including sexual arousal.