Hi Jam's wife. "Just a Wife" ?
I think you'll soon find that any wife/partner that takes the trouble to come onto a site like this to find out how best to help their other half is far from just a a wife.
Some men cope, some don't. Some cope by denying or ignoring the fact that they have cancer at all, which initially was my husband's attitude.
You know your own man best. You would, in any case, without any input from anyone on here, have given him all the love and support that you can muster.
My husband's Gleason was also 3+4 and he went down the low dose seed Brachytherapy route.
You could make a start for yours by ordering the free "Tool Kit" from this site which has all the information regarding treatments, side effects etc.
You'll need all the information you can gather in order to be able to make an informed decision. In general, hospital staff don't help - they expect you to make up your own mind.
Love him, and reassure him all the time. Eventually he'll get his head round it but it is a shock when the cancer word is used and worse still when it's no longer about somebody else but about YOU.
Chin up. You are already on the road to helping him by being here.
My other half will not come on here but he does listen to the stories I tell him and it has helped him realise just how lucky he has been believe it or not.
Take care. Best Wishes Sandra