How to Poo at Other People's Houses

I think my first girlfriend I've ever had, I... There's not been many. You can count them on one hand. Do you poo at other people's houses? If I absolutely have to. My friend told me that a plumber came around and asked if they could use the toilet. Thinking saying yes because I thought it was a piss and he had a shit. Bit like Super Mario. But do you have any embarrassing stories down? I mean, you've already told us some, but...