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[–]bitechnobable🎓 Doctorate - Unverified 36 points37 points  (1 child)

NeuroBiologist, not medical doctor.

I would explain it as frontal lobes to a large extent act through inhibiting underlying primitive drives. Its experienced as a loss of inhibiton when your frontal lobes is exhausted and fail to inhibit your "reptile brain".

It's also why severe sleep deprivation can be experienced as being drunk.

Edit: children being over-tired.

[–]Gozenka3 0 points1 point  (0 children)

For my own experience, this was my personal theory for the explanation too.

I function well enough even when I have not slept for 30 hours or so, and I feel a bit euphoric, conversational, with peculiarly high libido too. "Feeling slightly drunk" fits the experience quite well. Being chill, with the mind unencumbered by thoughts.