I think it's FANTASTIC he can talk to his mate about it. Being in a new town, my DH doesn't know a single person he can talk to about our IVF. Unlike me, who fell apart after our MC, my husband never skipped a beat - the next day he went back to work as if nothing had ever happened.
Even when I met him he had no friends really. He had a huge family with lots of brothers and sisters, and they were living on an isolated farm, so none of them ever needed to make external friends. As adults they have all drifted apart (or in the case of 2 of them, we cut them off - not the sort of people we would like to socialise with.) At work he is a Manager (working directly for the board) and he is basically paid not to be anyone's friend! He is there to do a job - that's it.
I don't know how he does it TBH. Your DH must benefit greatly from having a mate he can offload to - and then laugh it out afterwards