The funny thing is that 3000 years ago you wouldn’t get burned at the stake for thinking like that.

3.5 USD a month is a lot?

Wow, this brought back memories of me rubbing my hands against my old Nokia battery in middle school to heat it up and get a couple extra %.

The thing is that my o2 saturation doesn’t drop between yawns, which is what leads me to believe that’s not it.

That’s easy to check. I’m currently insanely jet lagged and super tired, yawning every few minutes. My pulse oximeter is indicating 99% saturation, so that’s not it.

Edit: on the other hand, I’m a flight attendant, so my body is used to lower oxygen atmospheres, so I usually have >98% O2 levels.