Why don't the dads get it??

Autumn
My LO is 5 months old and I became a mom instantly. My husband, I feel like, sees our son as a job- my job. When does the Dad gene kick in?? Getting him to do anything for our son is like pulling teeth! And when he does do something, he wants credit for it!! I haven't slept through the night in 5 months! I haven't had a day off in 5 months. But he plays golf every chance that he gets bc he just needs a day off. How do you get your husbands to pitch in and understand that our LO isn't just my responsibility?!😡