What's the age for first leg hair in boys? (born 1965) i know the mean age for a boy to have axillary/ underarm hair is 14.3 years, ranging from 13. 28 to 15.44 years. i'm looking for the stats for the start of leg hair growth, to compare?

Your post is odd. I place no value in evaluating the thickness/texture of common body hair. I know of no research on the subject or who would pay for it. In both genders babies are born with fine downy hair that gradually thickens with age. The eventual turn to more mature/thickened hair and the general distribution is influenced by hormonal effect and genetic endowment.