Scribbles (слэш)

Soulmates were something no one could properly explain. Scientist and nations had spent millions, if not billions, of dollars on trying to find a pattern or reason of how they are chosen. The best answer anyone could come up with was that it was all random. It was a timeless puzzle that some people drove themselves crazy trying to solve.
The link allowed the pair to share messages over skin. If one wrote something down on their body, it would appear on their soulmate as if it had been written on their own skin. Tony had spent a little over two decades before he got his first message. He had given up on the hope that he had a soulmate when he was fifteen and hadn’t gotten anything. It wasn’t long after if twentieth birthday that letters appeared on his arm.
(Tony and Peter are soulmates but it takes them a while to figure out.)