My ears of tin are over 50

I think if you can hear , you can hear. There is no text book guideline. I have a dealer freind that has a customer with hearing aids. I mentioned that the hearing aid would limit the bandwidth and the dealer told me he felt the same way. But the customer will describe differences in equipment setup with a suprisingly accuracy. So each of us must be individual in our senses. Now at age 40 it seems that eyesight gets weaker...in some of us. And there must be a reason 18-25 yr. olds don't use viagra. But hearing
will be dependant on how you used your ears in the previous 50 yrs.

I am starting to think about Mapmans comments on Viagra stimulating blood flow and enhancing nerve endings. Does that mean if we find ourselves enjoying music for more than 4 hours we have to go to the emergency room?