The group of people that practice The rhythm method are otherwise known as parents.

I had my tubes tied and for myself it never hurt, but I regret doing it as now I would like to have one more baby if that possibility comes up for me. I can have it reversed but it will be an expensive thing to do. The recovery time was very fast and there is no noticeable scars at all from it. If you are 100 % about not having any / more children then go ahead by all means. If you even have a bit of doubt about it though, don't do it.