Idiot Sandwiches #23 is Billie Bacon Double Cheeseburger

Billie takes an upper decker in the hosts' toilet at every party they go to with more than 10 guests.

They call it 'Poo Clue', a whodunit that's fun for everyone. Except it isn't really.

Billie is 52 years old and a math professor at their local community college.