Why does boring stuff make you sleepy?

Question

It's not being stimulated I know, but why sleep?

Answer 1

Our brain does not want to pay attention to the source of the boredom.

We get sleepy as a way to escape.  There is a positive side to this.

This can be very helpful as a skill to help us go to sleep.  

Answer 2

Because, it would be more fun to sleep than to watch the boring stuff!!!

Answer 3

Because your mind is not being stimulated, nor are the concentration levels high.

Answer 4

maybe because when we are at our most mentally inactive, our brains think we need to sleep? thats just my guess.

please help me with mine:

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Answer 5

Because your brain isn't being stimulated