Search Results: why do people dye their hair

I ask because if you think about it - being fat can be passed down genetically.

Obviously humans didn't exactly live in super abundant times when we had to survive in nature - maybe some humans, so humans were relatively fit.

What I don't understand, is if the first person who was fat, was only fat due to over eating - then why would that gene get passed down, if that person was originally a normal weight with a standard functioning metabolism? Wouldn't their kid get that gene? How does fat become a genetic part of someone?

Like if someone dye's their skin blue and has a kid - that kids not going to be blue lol - or women dye their hair, and the kids hairs do not come out dyed - even though the composition of the hair has been permanently changed.

So I wonder if there was originally just bigger weight people? Maybe the lived in climates where it was colder and food was more scarce, so they had to have a bit extra to stay alive. Now that's not to say they we're obese - they still had to be healthy to live long and function so.

Also, bigger people if they lose weight, some hit a wall where it would be unhealthy for them to lose anymore weight at all - or their bodies just can't manage it.

I think it was a natural gene passed down through generations. What do you think?