Libido...

I'm 27, my fiance is 28. Both of us are in good health. He drinks beer ALL day, he has NO sex drive. I throw myself at him ALL the time and he just rarely wants to have sex and I want it constantly. I have read that alcoholism can lower sex drive and sperm count... How do I get him horny and that sperm count up? He wants babies and I want to give them to him but that requires sex. In his defense, He does general labor and is up super early and gets home mid to late evening. But he's so young... Sex should always be in his mind. It's surely always on mine. Any ideas? Natural things I can skip into his food?