Hi, 68 yr old male here, (obviously) had TURP 18 mths ago.
Only noticeable change is slightly smaller Prostate due to it being reemed out from inside.
When riding a large Dildo, I don't seem to have as much stimulation at the Prostate as it doesn't seem to be as sensitive as Pre- Op, butt, I was constantly having to Urinate 24hrs a day due to irritation of Bladder as it was not draining completely, (it does now)
I do however seem to leak a LOT of pre-cum and do squirt (didn't before) when dildo is deep and I try to relax my Colon to take it deeper and past the Sigmoid sphincter to descending colon. (Joy)
So, I really don't think your Buddy would notice any significant difference if being penetrated as the psychological turn on will overcum any slight reduction in sensitivity.
For you Guys that are aging and noticing change in Urination habits, for goodness sake, go and get a digital exam AND a Ultra sound. The PSA test didn't actually pick up a significant problem, so DON'T take the Doctors word for it (we will keep a eye on it !)
Then get Cock Camera to see what is going on. I'm not rich or insured, so had to pay for Ultra sound and as results didn't look good, paid the $1100 for Cock Cam on top.
Ever wondered what the inside of your Urethra and Prostate and Bladder looks like ? Get Cock cam and find out...
DO NOT stick your head in the sand (or up your bum) as Prostate Cancer is a killer. Easily treated if found early.
Lots of friends my age (98%) are having issues.
The ones who denied it are DEAD...
Where's the Fucking Fun in that....?