I am almost as old as Vince. Unlike him, I was never a competitive bodybuilder....just a fellow who likes to be in shape and healthy. My inspiration to bodybuild was because as a teenager, I was rail thin and wanted to get bigger. Eventually, I achieved this. Having done that, I realized that it changed nothing about who I was, just how I looked to others. I have stayed with bodybuilding, continuing to work out today, even today at 67 years old. Thanks to this and being sensible about diet and exercise, I enjoy really excellent health for the most part. I no long desire to be "big" though, just being fit is good for me.
There is a fellow who works out at the same gym I do who is probably in his 50's. He's pretty huge and definitely works out heavy. What is interesting is to watch him move. He appears to be in constant pain. Obviously, something is not working right. I suspect he is trying workout like he did when he was young and it is just plain abusive to his body. This really seem counterproductive. He's a model for what folks shouldn't do.
Vince made a couple of good points. Most women aren't turned on by big muscles, they like men who look fit. Secondly, a person can add muscle even if they are a senior citizen, if they are willing to do what it takes to accomplish this. And sometimes it just takes too much and simply isn't healthy or wise. Big arms are nice, but they aren't worth having ruined joints. Obviously, Vince has seen the light now.
My rule of thumb is to not offer workout advice unless someone asked me for it.