It's funny you say that because I shave my head by choice. But when I did have hair, it was full and thick. It was annoying and grew so fast hence my choice to try shaving my head. However, I can barely grow facial hair. I only have a patch of chest hair, some hair around my belly button, very faint and little hair on my arms, and a little of bit hair on my legs below the knee. I do not shave my body hair. Meanwhile, I see naturally bald men who have tons of back hair and essentially hair everywhere else.
I wonder what the science behind that is!