Hmmmm, I don't want to cheat on my wife and I don't want kids.
Maybe I should shoot off my genitals ?I'll never miss 'em?
I hope you are joking. Your partner might miss them if you didn't have them. I don't know about you, but my genitals are a source of pleasure both to me and at one time to my wife when she was healthy enough for intercourse.
Whether or not you want kids is not relevant to this. Humans are sexual beings. Not all humans make good parents.
If the world were underpopulated, I might take up a different argument with you. But the world is anything but underpopulated. I am all for people choosing not to have children.
Having said that, I love my children and have never once regretted my and my wife's decision to have them and to have known them the last 40 some years. They are good people, better than me, and they are an asset to the world. How can I not take pride in whatever role I may have played in creating them.
You bring this having children thing up a lot. Are you sure that you are completely comfortable with your decision not to have them? Have there been moments when you had second thoughts?