One test that comes up reasonably often, usually while watching a film/TV, that I'm never quite sure how to handle is:

"She's pretty isn't she?"

It's usually a woman who looks similar to girls she knows I was with before we were married. I usually either keep quiet, or say something like "not my type"

I'm not quite sure what kind of a test this is and how it should be handled. Can anyone shed any light?