What does estrogen do in males?

Protects bone. Although estrogen levels are lower in men than in women estrogen is important in protecting against bone loss in men as in women.
Controls remodeling. ...Of bone. Estrogen is the hormone responsible for measured bone self-repair in men as well as in women. Men get estrogen mainly from testosterone. These levels decline with age, but not as suddenly as at female menopause. However, with low levels of estrogen, men can develop osteoporosis due to excessive bone self-repair changes.