Synched periods might happen in groups of people who get them due to pure chance, but it isn't an actual thing, and even if it was, it wouldn't be a decision one can just make.. 😂 (not laughing at you just at the idea that we have that kind of control over our periods.. If only!!!)

This is definitely a thing, all my coworkers are synced and the topic comes up at least once a month 😉

I still don't fully believe in syncing, but it would take time, and, theoretically, you'd have to spend more time with your partner than you do with anyone else.