Have shit in the shower before when I was younger. Problem was it was harder than a honeymooners dick and I initially tried to cut through with a extra strenuous burst of hot piss but that failed, so basically had to squash it through the plug with my foot. Unfortch the remnants were still firmly lodged within the crevasses of the plughole so I had to go back after with a toothpick and flick it out otherwise the next family member to use it might have noticed something untoward.