The last few times I was feverish & delirious my brain dragged up some wonderful early erotic memories that had somehow been lost in the mists of time. So it wasn’t all bad.
Stoner:
1. Some snakes have heat-detecting 3rd eyes or pits for detecting prey. I * seem to remember that IR has too long a wavelength for mammalian eyes. However bees and other insects can see UV, not that that’s relevant.
2. Dunno
3. It’s getting toward the foetal position & minimises heat loss, I reckon. Get well soon