Kneeling… is a salute made upon meeting a person. It may be accompanied by kissing the hand of the person, in which case the one kneeling will use his own hand which is farthest from the audience, and lift to his lips the hand of the other person which is nearest him. The lips should touch the hand very lightly and no actual kissing occur… The Ninth Kneeling Attitude means Respect. It is made by advancing to kneel upon one knee and placing the tips of the fingers of the right hand to the lips.
Edmund Shaftesbury, Lessons in the Art of Acting
Need to make a good impression on your boss or godfather? This Victorian stage kneel with optional air-kiss will get you the promotion you desire. Just remember: no actual kissing.