Attending: "I can't remember, what is the innervation of the bladder? S1? S2?"
Resident: "I don't know."
Me: "It's S2-4 for parasympathetic and voluntarily control, but the sympathetic control comes from T10-12." (I had just been studying for the boards.)
Attending: "Oh. And what does the sympathetic part do? Does that make the bladder relax?"
Me: "Sympathetic is for storage, parasympathetic is for peeing."
Attending: "Oh wow, I think you just helped me pass my PM&R recertification exam."
Resident: "So if that's true, how come when someone gets scared, they pee in their pants?"
Me: "Uh... I don't know..."
Resident: "Because being scared elicits a sympathetic response, right?"
Me: "I don't know. Let's google it."
Attending: "You think it's on google?"
Me: "Yeah, it's autocompleting for 'why do you pee when scared'."
We actually never figured it out. Google was surprisingly unhelpful.