Two great lines on this subject were:
1. I think it was Captain Brackett to Lt. Cable in South Pacific explaining how men (like me LOL) can still attract the lasses and find them equally attractive when he said, "...I, myself, am over fifty...I do not consider myself...through!!!"
2 We have a local radio talk show guy who is about my age. He once said something I can't for the life of me recall, but a young lady listener called and asked when he was going to stop being lecherous. He replied, "Never, I hope."
A corollary these days, while the subject rarely came up in my youth, is the lasses on my side of fifty are lookers of the first order. I'm pretty sure that will remain true for the next two decades, at least.
P.S. My grand kids do, indeed, wear me out. Last weekend they beat me up...just beat me right up. My wife was unsympathetic. She said I knew when I sat down on the floor they were going to come and jump all over me. I'm pretty sure if they come at me one at a time or even follow normal tag off rules I can still beat both of them two pin falls out of three.