I get what you're saying about "NO CHILDREN WANTED". There's a trick with it, though: sometimes people set up such a strong intention not to have kids, that they're unable to have them when they want to. You have to know how to stop intentions like that, because from what I've heard, it's not as easy as setting up a new intention (..and the couple in question didn't set an intention consciously, they simply decided to have kids once they have proper jobs, house, car, etc., yet they we're unable to do so once they got everything until they killed the intention).
I think that the best method for protection should be taoist practices where men learn not to ejaculate when having sex, meanwhile women learn to stop their periods when they don't have an intention of having kids in foreeseable future and then to resume their periods again once they want to get pregnant. It's done to save sexual energy, because men lose it via ejaculation and women lose via having periods. Oh, I'd love to learn this one, because it's not only you don't have periods, don't need any protection, but you also preserve energy and stay young and beautiful way longer than women usually do. And then there is redirecting sexual energy to spiritual development to get realizations faster. Sounds awesome to me
