I don't know... from my twenty-five years of experience with my husband and how he was after each one of our children was born (we had three) - I would say if he is coming home after work and not staying out all night this is probably just a typical case of daddy getting scared after having a child he is fully responsibly for come into his life... hence why he shy's away from sex (sex makes babies) and sleep is an escape from reality - give him some space and lots of unconditional love then see how he is in a few months.