hi hon
my DH has always been less keenon co sleeping until they are a bit older... in our case he ends up on the couch/speare room and i think he is worried about bveing opushed aside or the effect onour relationship (not bc of DTD but the intimacy). he has also always been worried about one of us smothering the boys, so until they ate strong enojugh to wake us or roll away or whatever (by this age this feae is lessened). i dont feel the same way but i have given into this one for him as it is importnat o him. that said he has always helped with settling (where he can both needed me for settling a lot of the time) and enjoys whatever snuggled he can get with the boys..
I think this is something onmly you can discuss together - maybe talk to him about it not in the heat of the moment (ie with a crying bub) but int he day and find out what is driving his resistance?