As those who have seen Jurassic Park will know, this means a tiny disturbance in one place, can cause a major change in another. A butterfly flapping its wings can cause rain in Central Park, New York. The trouble is, it is not repeatable. The next time the butterfly flaps its wings, a host of other things will be different, which will also influence the weather. That is why weather forecasts are so unreliable.
In the theatre, you are in love with what is on the stage, with the moment. You just don't get that with movies or videos, or TV, where you know that what you are seeing is repeatable.
'Let's Get It On' is a classic Motown single, endlessly repeatable and always enjoyable.