Is it normal to laugh at one's own jokes?

Hahahah you must not know me then :D I cause myself to cackle quite often. Someones gotta laugh at my lame shit, why not me. Keeps me happy :)

I laugh at my own jokes, who else will get your humor better than you?

Sometimes I can't spit out a punch line because I'm in too much pain on the floor crying.

Oh yeah, I do all the time. I also have this television show that I created that I think is absolutly hilarious. When I watch it in my head, I can't help from laughing.

Everyone does.

Haha, I do that alot. Sometimes when I know I'm gonna make a bad joke to cheer someone up I laugh along just to make them join me. Works like taking candy from a baby. It's normal.

If I don't laugh, no one will!

It's very rare. Maybe a couple of times a year. They're usually the ones where I've stumbled into something funny almost at random, rather than properly sat down and thought about it.

The last one I did that with, there was only really me and Parrish that found it funny.