At what age do men stop having a boner?

That may not be entirely true. At 77 I have not seen a woody in over 10 years. I had 6x heart bypass when I was 55 and went into cardiac rehab afterward. At the beginning interview the first question she asked was "how's your sex life?" Apparently the ability to get an erection is somewhat of an indicator of heart/arterial function. I was fine at that time but at some point it went away. Last summer I had a full series of heart related tests which showed my heart/arteries are working perfectly so I think the ED is related more to my wife's attitude toward sex than anything. She seems to look for anything that might turn me on so she can make sure she never does that but she's been doing that for over 50 years only now I guess it's having some effect.