we play a hot game to make this sort of thing happen. Whenever we go to a bar in plain daylight we choose tables where I sit giving my back to another table where there is a man alone and she sits in front of me, and also in front of him. I slowly pull my chair to the side so he can get a full view of my wife. Then the teasing starts, hair arranging, making faces, lusty eyes, discrete smiles, wide spreading legs, even touching her tits. When she know she has made him horny enough she stands up to buy something or to go to the rest room. Both of us know he will follow her. Sometimes things go further in the rest room - i know it from the time it takes for her to come back- but other times just some touching, cock rubbing on ass takes place in front of everybody. Not at all embarassing, but a huge turn on for both, a scene to remember for weeks, even months.