Amateur filmmaker Tatia Pilieva has captured that most transient of human interactions on YouTube - the first kiss - in a touching video that reveals the wave of nerves and laughter it seems to bring us.
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Strangers were paired off and given no instruction other than to lock lips, with the seconds proceeding the kiss proving as interesting as the kiss itself.
"We're going to kiss," one volunteer tells her partner, who replies with a look of eagerness/trepidation/panic: "I know!"
"You have nice eyes," another offers to fill the silence, to the response: "Thank you, so do you" and much awkward laughter.
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