the same way no farmer has ever reaped a seed that he sowed but never watered , manured , weeded or sprayed with pesticides is the exact way a man can not choose to impregnate a lady and expect to be a father after he let her make all the trips to the pre-natal clinic , deal with hormonal imbalances , develop strange food cravings , double her weight , get stretch marks , go on maternal leave , decorate the nursery and undergo the contractions and hours of labor all by herself .