Laughing at my own jokes

I will admit that I laugh at my own jokes. I don't try to, but it happens. I usually laugh when think that others will laugh, but I end up being the only one. I think it is because I am used to theater, and the audience laughing at the jokes, and I want to laugh along. So, I laugh. It is tacky, but I do it. This one isn't genetic, I swear this one this is only me.