Yes, I agree with what has been posted so far. Everyone gives off some type of signals, waves, or vibes (whatever you prefer to call it). Especially with facial expressions. The way someone looks at another, their eye movements, or the way they hold their head when they speak or are spoken to.

Have you given any thought as to what your expression was when he mentioned that you "needed a spanking"? Perhaps that is all he needed to question whether you are "kinky" or not.

Just my two cents worth.