When talking to you, the extrovert mathematician looks at *your* shoes.
ANSWER: Because he's afraid someone would look through the keyhole.
Just look for ones that have a "JOKE:" disclaimer
Like if you're talking about them, you aren't having a rough enough time already.
Me: My desires are..imagines having a talking Pug named Maurice that I watch Netflix with...Unconventional.
Al Gore's the stiff one.
Dam! A customer told me that joke, equipped with an " old guys rule" shirt and a hardy fist bump.
The extroverted mathematician looks at YOUR shoes when he's speaking to you.
Moonwalking
Don't worry, they'll tell you.
Why does it have to be a group activity?
An extrovert mathematician will be looking at the other guy's shoes.