What is the reason behind the need to “fall” asleep rather than choosing to be asleep?

Question

What is the reason behind the need to “fall” asleep rather than choosing to be asleep?

In: 252

Answer 1

We can only actually choose to do two types of things:

1. think
1. move muscles

We can’t choose to sleep any more than we can choose to digest food or choose to change our heart rate.