Just by looking at a person or even hearing his or her voice over the phone, you can tell if he or she is amiable. True, some over-the-phone grumpies may seem pleasant enough in person...but most often warm people are warm across any medium.
I of late have been observing some mighty lukewarm people and it bugs me no end. Even with a 'Hello' you can make out the warmth or lack of it in the tone ...and therefore its meaning. Actually, I think lukewarm is downright rude.
But it's not the case with lukewarm water in the bath though!
Aaaah. Lukewarm water is just perrrrfect:)