why do people say that when you have sex with someone you share a part of your soul with that person? what does this mean for promiscuous people? are they just spiritually diminished people?

Fembots post a pic of a guy resembling your ideal boyfriend

Just saw that thread where the asian guy got more ripped and he was very very cute. I think east asian men look super attractive with the contrast between a cute/youthful face and a gym body. An example to help guys understand this look is like asian girls with a cute face and big tits, kind of the same contrast.
But sadly I dont see many asian guys hitting the gym.