It is all hormones, blood sugar levels, and mood swings.
We do whatever our lizard brain decrees and the gray matter works overtime to come up with a rational explanation.
I expect the "soul mate" phenomenon to usually be short-lived. Later selves will deny the experience.
If necessary, the frontal lobes will hallucinate some type of romantic vision to explain our bizarre actions to our rational selves.
@rrb I think two things can be true at once.
"Nothing is true, everything is permitted" - Hassan-i-Sabbah
(or Nietzsche, or William S Burroughs)
@RickiTarr
Just snuggled with my dog and my OXTR are full of oxytocin. I take it all back. Love is all mystical moonbeams.