Insecurities in the relationship but also in yourself?

Hello everyone, Lately I've noticed more and more that I'm incredibly insecure. I've been in a relationship for a while now. We've just gotten through a very difficult phase, and things are looking up again. Some things are still bothering me, but they'll get better. (He said he wouldn't move away with me after all,…

Why does a headbutt hurt less when you're the one doing it to your opponent?

Whenever I gave someone a light headbutt back then, it hurt me less than it did the other way around, whereas every time I had a severe headache, the other person didn't experience any of that pain. But according to Newton's third axiom, the law of interaction, the same force with which one hits something…