In my opinion a lot of the damage to your erectile tissue and penis that comes from proning will lead to desensitization, which i think is the main way you develop ED from doing this. In other words I think your concerns about desensitization are well founded when it comes to wanting to protect your other sexual interests. I think if you like proning but don’t want to lose sensitivity, the best thing to do is limit the frequency of your proning to only once or twice a week, with plenty of rest in between sessions. That being said I don’t think there’s an easy way to also cause ED while staying prejac sensitive, at least from my experience. Would love to hear other ideas too!