Talking about social relationships - I for long dreamed (fantasied) about device that lets to merge two and more people thoughts, memories, experiences. Always

Talking about social relationships - I for long dreamed (fantasied) about device that lets to merge two and more people thoughts, memories, experiences. Always wondered what would happen from it. And, I guess, maybe it's technically possible if we ever figure out how to read and write human brains/body chemistry?