as the men in his family die young. His father died at 56 from complications of diabetes.
IMHO therein lies the reason for your Hs MLC. That and his overwhelming desire to procreate.
Don't ask me how you get over that b/c I'm having similar probs. No procreation probs obviously but my FIL died of cancer at 57(and this seems to run in his side of the family). I think the good thing in your sitch is that Rich has made the connection and verbalised it whereas my H is still running from it.
take care
Me 43 XH 45 M 2.7.88 Divorce 7.10.09 Kids D20,S17 & D15