You know, I used to call it "conversation time" growing up, and it was how I coped with loneliness & my parents being closed off. Wasn't just serious stuff either, I would genuinely "debate" stupid things out loud to myself. My mom walked in one time when I was a teenager and she thought I was batshit but never brought it up again. It was never really like a total schizo split personality/tulpanigger thing, I was fully aware it was just myself.
I like to laugh at my own jokes too. Every morning I tell myself "shower time kike" before I take a shower. I'm rambling but you get the point. It helps a lot.