Kissing is the act of pressing one’s lips against another person or object. One might kiss for a variety of reasons, as a kiss itself carries many different meanings depending on the culture and context of the situation. A kiss could express sentiments of love, passion, sexual attraction, friendship, peace, affection, good luck, and so on. In certain situations, kissing is also done as a formality or symbolic gesture that indicates devotion, respect, or sacrament. While it would seem that such a practice would be particular to humans, scientists have observed kissing and kiss-like activity in other species, such as the antennal play of some insects, the billing of birds, and even similar behavior in dogs, cats, bears, and chimps.
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