I've done this with a mental visualization of Mark Hoppus (from Blink-182) since I was 12. 10 years. It's not every night or anything, but when my anxiety is really bad my little mental version of him always seems to soothe me. And yes, I recognize that it isn't real, like the OP. I used to think it was just me, so it's cool to get validation that others do it too.