I often think this about laughing. We know what it means (happiness, humour, positive social interaction) so we experience it as a nice, warm thing. But if you actually listen to someone laughing and separate it from that meaning, it's the strangest thing - a really loud, repeated noise that you would associate with jungle sound effects.
Dancing is odd too. So is music. A particular, formalised arrangement of sounds that makes us start leaping around and waving bits of our bodies.