Porque no los dos?

People forget that we're just animals with a teensy bit more awareness of our instinctual drives; and we have developed terms like "fun" and "love" and "joy" to describe the feeling we get when we engage with those drives successfully.

If a higher-level being were to observe humans dancing in a social situation, they might ask if we're doing it for fun or as part of a mating ritual--neither would really be wrong.