I know such a person which is why I mentioned it. That vast range of human physiology is fascinatingly wide. He also is very aerobically gifted, possibly related things. (efficient engine, but not confirmed with testing, maybe just a big engine and loves food)

Completely fair.

Thinking on it, if food is,I eat it. Any pizza is a personal pizza, if you like pizza. :)

Still. Guessing most folks that can ride fifty miles are not overweight.