Should there be a “ne” at the beginning of the question? Any help or insight appreciated. Many thanks.
The correct way starts with “ne” indeed. “Ne vous a-t-on jamais embrassé auparavant ?”
However in casual talking, French people often omit the “ne” in sentences. Just like "T’as rien fait. " (You didn’t do anything) or “Je suis pas malade” (I am not sick).
I discourage omitting the “ne” when writing (except with friends) IMHO.