People know that they're going to see something which is entertaining but challenging as well because of the form it's in. It's dance theatre and it requires you to use your imagination - it's not straight forward.
I had daydreamed through many performances of Swan Lake, thinking the dancing tutus only ever conveyed one aspect of swans: their beauty gliding on water. I wondered what it would be like to use male dancers and bring out swans' aggressive, muscular side.