I'm 47, and Boisdevie already typed my answer.
In addition, I would say that I am more capable of appreciating the beauty of attractive middle-aged women than when I was younger, though I still find younger women more attractive on average. Physically, everything is still working fine for me, though it probably helps that I am a fitness freak. I've been working out regularly in a gym for the last 21 years, and I was pretty active before that, too. However, I feel that I am less easily manipulated by attractive women than when I was younger. I learned the hard way over the years that a pretty face is absolutely not a prediction of a good personality. As time goes by, looks fade and the personality becomes really important. And, this is kind of odd, but I feel like I can see past age more easily now. I can look at an older woman and more easily visualize what she might have looked like as a younger women, and I can look at a younger woman and more easily visualize if she is going to age well or not.
Good decisions come from experience. Experience comes from bad decisions.