You can't just say the practice in question is icky.
You have to state a principle and think through its implications. You can't appeal to Victorian morality; Queen Victoria married her first cousin.
Dumpees, in particular though, are devastated to learn their ex is moving on in what seems like hours, or days or weeks after a split.
Often, you have to change your opinions on related issues in order to honor that principle, or you have to throw out the principle and change your mind about the original question. You can't appeal to the Bible; in the Bible, God commands marriages between first cousins.
Instead, advocates of laws against cousin marriage appeal to science.
He broke up, thinking that he would find more satisfaction with another woman or as a single person.
Being away from you, however, clarified his real feelings and allowed him to see that he does like you and maybe even loves you. If you broke up with him due to behavioral issues, the time apart may have allowed him to understand his mistakes.
It’s hard not to be worried sometimes, but we don’t want to be paranoid or controlling. Here are five times when your worries may be somewhat justified and ways you can make the situations work for you.