And btw... dry lips will serve as a warning that one is dehydrated...

And flavour has nothing or little to do with pleasure btw, flavour sensors in the mouth is a tool to warn or encourage you to match your food cravings with what you actually put into your system....

After taste too.... that is a sign that you had too much of something...
Salty aftertaste? Too much salt during that meal!
and so on....