What are unzipping or zipping?

Opus and I were talking on the phone. As I had him on my head set, I was looking for something and putting on my make-up. I have a purse that has zippers. So, I am unzipping and zipping. He either has good ear or my zippers are awfully loud.

We are having a conversation and he hears the sound. Suddenly he says "what are zipping over there?" I playfully said "I am unzipping your pants and you are unzipping mine". He then replies "you are very very bad Scarlett you know that." Oh yea, how bad am I? What you going to do, spank me? His laugh was so sexy, it just makes me melt.