Public displays of affection are inappropriate yes or no?

Depends on where you are, and what you're doing. ---- According to classical etiquette, it isn't proper to draw special attention to yourself in any social situation. So a friendly greeting, an embrace, or a brief kiss among family, friends, and lovers is considered perfectly proper. People of good taste who want to exchange more than just a quick kiss or a caress will wait until they are in a private setting where they can be alone.