We tend to remember all the good times with an ex that makes us regret breaking up but instead think of all the stuff that pisses you off about them. The time they kissed their neighbor and didn't tell you, or hiding co*k pics she gets sent to her, remember those and then you start to be like ya screw that chick, I am glad we broke up.
I never had the desire. Still don't but Katie wants them way more than I don't want them and I will do whatever I can to make her dreams come true. I love being a dog parent so I'm sure that would transfer to kids if the universe decided so.
