Well ---my Dad's in his 70's, still works full-time, and is very active---he can run circles around men much younger and is in great shape. He probably would be attractive to many women much younger but he's got a wife. I know of a woman who is 86 and still gets up on her roof to maintain her air conditioner and she's also in excellent shape, she was complaining about her 70 year old male neighbor having to hire everything done because she does everything herself.
Good for him, I retired 16 years ago but I am very active and do all my own home maintenance, hate to clean house so I dust every odd year, had a young gal come in but it became to complicated, so I ended her employment, don't cook, eat 95% of my meals out. It is hard to eat healthy in a restaurant but I manage.
Glad for your Dad, life is much more fun when you can keep up with what is going on around you. He sounds a little like me. More power to him.