In my case, as in my fathers, I have relitavely sparse body hair, little on my legs and almost none on my chest, I have a thin beard as well. I have been on TRT for more than 15 years, pills, creams and shots. I am in my late 50's and have never gained a single body hair, nor have I lost a single hair on my head as a result. I believe if you are genetically predisposed to be hairy you will be and visa versa. You may or may not sprout additional hair as you age, as your father and other family members probably have, but I do not believe that exogenous Testosterone will contribute to it, It definately has not in my case. I don't think that it is anything to worry about.