Thanks again
@JohnM - your post armed me so I was able to have a better conversation tonight. I told him he had no choice - given my profession I work in facts and he needed to give me them.
Surgery was apparently very invasive and was about scrapping it all out vs a removal of prostate. Apparently in a younger patient, it would have been treated instead with radiotherapy for 6 weeks.
He mentioned having been on some injections earlier (as he waited several months for the surgery) - that stacked on 10kg in 4 weeks.
Follow up is in a few weeks - about 2 days before I am over there.