Do you also get tired from thinking or is it just me?

When I began my first semester of high school, I would fall a sleep from exhaustion after 2 hours of math home work.

When I began my first month of university, I would fall asleep after 1 hour of psychology homework.

When I attended my first full day seminar, I was drowsy after 3 hours of collaborative team work.

When I watched my first Sesame Street video in Hebrew I was drowsy after 15 minutes because my brain was tired.

Do you also get tired from thinking or is it just me?
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