Sounds like it's time for some enforced reading/video watching. I can recommend "So you're going to be a Dad?" and there are a few videos around, maybe ask at your public library?

Or you could just go on strike! If you serve him a can of baked beans on a plate with a can opener for dinner, he might start getting the idea...?

DH was pretty clueless first time round, he started to get the idea though after I sat on the ground and cried (with exhaustion) halfway through our removals day. I've got to say, he's been much more sympathetic this time round, I think it was seeing me in childbirth, opened up a whole new world of respect for female kind! LOL