I cannot think or comprehend of anything more fulfilling than having a son. Honestly, think about it rationally. You are feeding, clothing, raising and rearing a boy for at least 18 years so that the world might experience a radiant bundle of happiness and love. All the hard work you put into your beautiful little boy - reading him stories at bedtime, making him go to sports practice, making sure he had a healthy diet, educating him, playing with him. All of it amplifies the joy everyone he meets shall experience when he greets them and takes precious time from his day to make theirs a little better.
Raised the perfect boy? Great. Who benefits? Everyone. Strangers on the street get a friendly bystander that will wish them well, the homeless will get a wealthy and intelligent boy that runs shelters to feed them and find them honest work to get off the streets. The lucky man who marries him will get the perfect partner, and you'll benefit from gaining a second child in his spouse, one who will be a dear friend that thanks their lucky stars you raised such an astounding man.
As a man who has a son, you are LITERALLY dedicating at least 20 years of your life simply to grant your wondrous, miraculous son and all the people around him a better life. It is the ULTIMATE AND FINAL reward. Think about it logically.