My sister had a friend that couldn't feel heat. She'd easily burn herself all the time. For example, she'd wash her hands and not realize she was using the hot water and get scalded. She learned to watch for steam and other indications that the water was hot. She was also color blind.
You may remember me as 69Ron. I was suspended years ago for selling bunk products under false pretenses. I try to sneak back from time to time under different names, but unfortunately, the moderators of the DMT-Nexus are infinitely smarter than I am.
If you see me at the waterpark, please say hello. I'll be the delusional 50 something in the American flag Speedo, oiling up his monster guns while responding to imaginary requests for selfies from invisible teenage girls.