[maksimur]

Would be interesting to know why yawning induces sleep at all.

[neetle]

My psych pointed out that yawning is a tension release mechanism, so it’s likely just punting a bunch of cortisol from your nervous system

[mirekrusin]

I use forced yawning to wet my eyes when they become dry, works better than any drops.

[dotancohen]

I do this as well. It is probably both a symptom and an initiator of certain sleep-associated changes in the body.