The extroverted mathematician looks at YOUR shoes when he's speaking to you.
You stop milking a cow after 14 years..
You can get cereal without nuts.
Well she has to be hot. And well-rounded. And cheesy. Extra guac. Wait, wrong list, this is my Chipotle order.
Look mom, an angel!
I apollogize.
They didn't speak sine language.
A slipper. (Made this up today, but almost definitely will have been made up before by someone else)
The extrovert looks at the other person's shoes.
An extrovert mathematician will be looking at the other guy's shoes.
Introverted Engineer looks at His shoes when he's talking to you. Extroverted Engineer looks at Your shoes when he's talking to you.