There is a cross-over point, it's around your body temp, so usually between 36 and 38C. In France we have thermostatic shower mixer with labeling around this te

There is a cross-over point, it's around your body temp, so usually between 36 and 38C. In France we have thermostatic shower mixer with labeling around this temp, with even a push button lock that can prevent you from going over 38C if you wish. Isn't this common in the US ?