Gaining

It's a genetic toss up between two completely different genes. For instance you may get a gene that predisposes you be fat, and one that codes for less body hair or vice a versa.

Though there are several "linked" phenotypes, this isn't one of them. Other factors can influence the growth of body hair, such as testosterone levels and nutrition, but weight gain isn't one that has any measurable effect.

Fat usually produces estreogen which feminizes the body. So, you will get less hair, boobs and hips

I've noticed a significant increase in the amount of hair on my abdomen sinc eive started gaining. and i have a girl mate that has dated a few bigger guys and she observed and increase in body hair on her men if they gained or were big...? i dunno...

Any conclusive proof to the increase in either of the hormones as a result of gaining. id like to know a bit more about that