Oh it totally happens. I think part of what makes a performer is whether you find that embarrassing (like me) or if that makes you want to sing them for others.
I’m not a musician, but I like coming up with my own silly little songs. Every once in s while I come up with something less silly that I actually like and it goes through my head for a little while.
I hope my cats likes my singing, because I would never show anyone else. I’ve got my creative outlet already. I don’t need a new form of imposter syndrome