Kiddushin (1)

Sometimes a quick exchange communicates more effectively, and more personally, than an article. Sometimes, just seeing that others share our questions can make us feel more connected. Our posted questions and answers are an opportunity to learn from each other. Keep in mind that each questioner’s situation may be unique, in ways that affect the halachah. Even the tone of a question can affect the tone of an answer.
Proposing with a ring when it's not part of kiddushin seems to be superfluous (like getting down on one knee). Why do so many frum Jews do it? Is it permissible?