Kind of unsure of what your trying to ask... appeal meaning what? If your asking when does a man sex drive typically wane there are studies that show once men are married and have children there testosterone levels decrease which makes them less likely to desire and think as much about sex. If your talking in terms of when does someone stop being attractive, I feel like that's kind of irrelevant because most the time I feel like men age well and women don't haha. Most men can pull off grey hair where as more women will get there hair colored.
As long as you never become miserable and bitter yourself, life is good!