Subject: Why does warm water cause a gag reflex?

My friends and I were pondering why lukewarm to warm water causes a strong
reaction in many people, yet hot beverages like tea do not.  I like my water
room temperature, but they both prefer ice cold.  We all found the range between
room temp and hot to be awful.  Could the distaste for warm water
be evolutionary, in that illness-causing bacteria would grow more readily in
stagnant warm water than in a cool stream?  Or is that reflex simply a product
of American culture, that we are raised and trained to like our drinks cold?

Re: Why does warm water cause a gag reflex?