Here are some of the more embarrassing possibilities and how to (hopefully) alleviate some of the inevitable awkwardness.

Like the age-old debate of whether the chicken came before the egg or Mac vs. PC, comes the question ‘does size matter?!?’

"So what's your major...?"

If you are trying to get it in avoid these obvious deal breakers to stay in the clear.

Detect what he really means with his opening approach.

They might be staring at you, but that doesn't give you the right to stare back.