I am kind of concerned about if he's doing this consciously, too. Mainly because of the pregnancy issue and because it's causing you (the OP) mental distress and physical stress from the EC.

I would recommend him seeing a doctor though, too. Just because I'm assuming the best of him and I'm worried there is something physically wrong with him. I don't know if frequent night emissions have the same risk as parapism(sp?) but it definitely wouldn't hurt to have him checked out.