a kiss, as i perceive, is not heart-shaped, as you might believe, but is probably round, and is certainly red, like a matador's cape - as an omen of things ahead.
it's neither chaperoned with some remarks, nor as good when thrown, but often given in thanks or followed with a sigh. sometimes there's sparks, but sometimes, it's just goodbye.
kiss is neither a vow, nor monarch seal, but when disavowed there seems to be a loss. it is like tasting soup: some salt may add appeal, but, often it just tastes like goop.