Short kiss sounds like this circulate widely on soundboards and in short-form video because they are instantly readable without words, especially in Spanish-speaking chats where beso means kiss. The elongated spelling mirrors how people type an exaggerated kiss online, stretching the final vowel for emphasis. At under a second long, it fits reaction clips, memes and voice messages, and its popularity comes from that simplicity: one playful noise can signal affection, teasing or thanks without needing dialogue or context.