An extrovert mathematician will be looking at the other guy's shoes.
A trampoline doesn't look adorable in a sailor outfit
How do you expect us to find you if you look like Beyonce on Facebook.
It never happens just once.
Ask him/her to pronounce unionized
The extrovert looks at the other person's shoes.
The extroverted mathematician looks at YOUR shoes when he's speaking to you.
When talking to you, the extrovert mathematician looks at *your* shoes.