I think that the older you are is a true testament that you embraced the lifestyle in flesh and spirit. I mean, as youngsters, we are driven by hormones and curiosity. Many probably give up, kids drain you, etc. But if you are still into it +40, it means its no longer just a thrill but a religion; so to speak. I take my wife more seriously now at 50, when she says she wants to find a new date. I know she means it and wont back out as she would have in earlier years.