One can classify the kiss according to the form of contact, as in the tangential kiss, or kiss en passant, and the clinging kiss. One can classify them with reference to time, the brief and the prolonged. There is also, with reference to time, another classification, and it is the only one I have really cared about. Thus a distinction is made between the first kiss and all others. What reflection focuses on here is incommensurable with what the other classifications bring to light; it is indifferent to sound, touch, time in general. But the first kiss is qualitatively different from all others. Few people consider this; a pity if there were not one who thinks about it.