Tobacco and alcohol use, and some medications have a huge impact on semen health and regeneration. My husband had low semen volume, and sperm with low motility. Ever since he quit smoking and drinking, his semen volume, sperm count and motility has increased.
If anyone is having fertility issues, please stop your bad habits. It's not enough for the woman to be taking care of herself. It goes both ways. Both the man and the woman need to have a healthy reproductive system for fertility. And that only happens with a healthy lifestyle and healthy diet.