An extrovert mathematician will be looking at the other guy's shoes.
Because he's always looking for a tight seal.
Dirty looks from the mouse!
Because the stalks are all ears.
Uh, with my.. gf " Gf Well, tell us about her! What's her name commercial on tv uh.. Lisa.. Brandnewtoyota
The extroverted mathematician looks at YOUR shoes when he's speaking to you.
When talking to you, the extrovert mathematician looks at *your* shoes.