Is that normal?

I ask my friends if the things I do are "normal" and they often laugh, some nervously. For example, sometimes, when I'm walking out in public, I remember something funny - a joke or something that happened to me - and I laugh out loud. I don't mean a little chuckle or a quiet smile; I laugh like I'm at the Comedy Connection. Sometimes, after I realize that I'm out in public by myself or with someone who doesn't know what I'm laughing at, I usually get strange looks. Is that normal? Is it normal to laugh out loud at an inside joke when it's an inside joke you have only with yourself?

Is it normal to feel naked without socks, pulled so tight that you can almost see your toes through the fabric? Or to clap and literally shriek with excitement (sounds like "weeeeee") as you're leaving work because it's the end of the workday? Is it normal to know every line of every episode of the Golden Girls when you're not a retiree?

Normal or not, that's me. Unfortunately.