Waiting for her date to arrive. Very familiar, and always sexy to see the anticipation.
After sharing my wife a few times she started feeling pretty sexy about herself. I told her that she wasn't allowed to wear a bra or paties when we go out. At first she was uncomfortable with it, but quickly came to get turned with the attention she got from guys with it, including myself.
Have done this a couple times when my wife asked me to take the pictures and video to send to guys she was wanting.