New Dirty Old Man

OK, new here, 72 yr old with ED. I started with the MGX and at first it was a bit uncomfortable. Using Lynk water based lube, seems to work pretty good, but... After the first try, I got a bit of upset feeling, thought it might be the Lynk so I switched to KY jelly. After the first session the uncomfortable got lots better, but still the upset feeling. That has finally gone away. At first I felt like 'sex' in my groin, it was somewhat pleasurable because it made me think of sex a lot. But now I get a bit of sore feeling in my groin and the 'sex' feeling has pretty much gone away. I did mention prostate massage to my GP the other day and he never heard of it and thought it was not a good idea since I don't have any P problems. I'm trying to use this as a replacement for sex, still married and the wife achieves orgasms with toys but I can't keep any sort of erection so I was looking for some fun. I'm just wondering if I'm overdoing the toys and should back off for a while to see if I get more comfortable in the groin? Wonder of others experience this. I have achieved a somewhat O a few weeks ago, but would prefer ejaculation to that, it felt somewhat unsatisfying. I have lots more questions, but I'll leave it at that for now. I did get the Maximus and have the Helix Syn on order, but I really prefer the MGX, I like the way it goes in and massages the P once it gets past the large spot, it just sort of sucks in and feels really good. I've only been using maybe 15-30 min sessions to start since I seem to have some internal discomfort. Thing is this feels so good, I want to keep doing it.