I don't follow your logic. Why would it be a waste? Wouldn't it actually be a waste of both your resources and mine if I feigned interest? You'll keep talking, and my mind will keep drifting.

I understand smalltalk is necessary to break the ice. I'm perfectly fine with the "How you doin'? Fine. It's hot today, isn't it? Well last week was worse!" exchange. I can even understand the "I went shopping" comment.

What I don't really welcome is a walk through your shopping day.