“Some authors will have it, that a kiss is no kiss, or at best a half one, unless returned at the same time… its signification is determined by the circumstances, the degree of warmth, the part, the time, and other particulars needless to enumerate. But of all kisses, the turtle-billing one is the most emphatic, but rarely used, where there is not full liberty to use every thing else.”
A Dictionary of Love, With Notes
Next time you need to interpret the signification of a kiss, take careful notes on the degree of warmth, the time, and the… part.