To quote a relative of mine, when asked if he and his wife were going to have a third child: “No, no. We found out what causes that. We don’t do that anymore.”
My vasectomy was 15 min in and out at no cost to me (ten US states require insurance cover with no cost sharing as of this comment), and I have all the sex I can get (respectfully asking anyone who might be interested) with no offspring risk. Perhaps this is not a well known option?
It's a joke about having children diminishes their father's sexual attraction to their mother.
Is it? I’m not sure how you interpreted it that way.
It was definitely said tongue-in-cheek. At the time I interpreted it as “we’re done having kids, and also we’re running around after two little kids and too tired for that.”