My boyfriend and I have very weird aspects of our body that match. I have pectus excavatum (concave breastbone) and he has the opposite, his breast bone comes outwards, Ive heard it called pigeons chest. So our chests are the opposite but literally fit together like a puzzle. No this isn’t cheesy like oh we are soulmates, I just find it cool. Also, tmi kind of but on my vagina and his penis, we both have the same sized birthmark that is completely different colored from our skin tone and every other birthmarks. His is much light and mine is much darker. We also are able to sense when something is wrong with one another even if we aren’t talking or near one another and our eyes will immediately meet in a crowd full of people and it’s just weird but cool! Just thought I would share