I'm getting erections a lot more now!

Hey guys, still pretty new to this but I'm on day 58 of NoFap and for the last week or so I find that I'm nearly getting boners anytime I think of something sexy like they are complete rock hard now! And I have more feeling in it too. It's hard to explain. More sensitivity I guess. Before it I would think of something that would turn me on and not much would happen down there! I didn't realise back to when I was pmoing that I was that damaged, but even when I was masterbating I probably wasn't even getting 50% as hard as I can now! Now I'm realising that my sexual health was so bad for that long. Is this a sign that I've already recovered guys? Does it have anything to do with testosterone levels? What's the science behind obstaining from pmo and getting decent and frequent erections?