Dinner with D-- and T--:

Me: I'm going to find a bathroom.
T: I've got to pee too (makes no move to get up).
Me: Are you going to come?
T: I'm going to see if I can make it home.
Me: What's wrong with you?
T: I like to challenge myself.

My cousin once said that my mother never saw a toilet she could walk past, so I don't understand T's motivation here. At all.