"Fahrenheit is how people feel" only makes sense if said people have never used another scale. You know how 100F "feels" because that's what you use. If you used Celsius you'd know how that scale feels instead, and be used to using the more useful scale generally.

See also: people who think they don't have an accent.

Celcius is how I "feel", because that's the scale I've learned and can relate to.
Farenheit is what you "feel" for the same reason.

It's not because one is intrinsically better linked to our bodies.

"Kilometres is how cars drive. Feet is how people run"

This has the same level of nuance and thought behind it. It's just stupid.

It only works if you grew up in a country that uses Fahrenheit. I didn't, so to me Celsius is how I feel. I've no idea whether 20 f is jeans and a t-shirt weather, or if I should be getting my coat. 20 c however I know that as long as it's not windy I'll be good with jeans and a t-shirt, but that it's still a little too cool to get out my shorts.

America maybe?

You mean other than the fact only a tiny proportion of people in the world use Fahrenheit?