Yes I'm in exactly the same situation. 50's, married bottom who loves being fucked. I've been seeing a guy on the side for 3 or 4 years now - 26, blond cute and a great fuck. Last year we started barebacking (at my suggestion, in the heat of the moment). Initially he would pull out, but the more I thought about it the more I wanted his sperm in me. The thought of this beautiful, fertile young man giving me his babies became an obsession for me. Eventually I insisted he didn't pull out, and the sight and sound of him pumping his heavy load into me was bliss. And the sperm running down my leg later was amongst the best erotic experiences I've had. We haven't looked back, and the intimacy of fucking raw is I think a huge turn on for him as well as for me.
So now I'm addicted, but plainly taking some pretty stupid risks, because I don't want to catch anything.
Despite all this I've just made yet another date with him for tomorrow.
Any thoughts anyone?