Am I becoming desensitized to humor or losing my sense of humor?

I’ve always had a kind of weird sense of humor, but I was looking at funny pictures on Reddit the other day and there were very few that actually would make me laugh out loud. Sure, there were ones that made me blow more air out of my nose than usual, but that isn’t laughing. I know that its a possibility that there isn’t exactly a lot of actual funny things on there, if you’re familiar with the website, but I don’t think that’s it. They are all things that I would have laughed at maybe two years ago, but not anymore.

Even when I watched television shows like the Daily Show or the Colbert report I would laugh at the funny comments that they would make, but now I just kind of watch it with a straight face.

Don’t get me wrong, I’ll smile at things and I’ll enjoy them, but I’m not laughing as much as I used to. It’s kind of like how when someone watches scary movies a lot they get used to the jump-y-out-y parts and they don’t jump and scream as much as they used to.

Is it that things are not just funny to me anymore or is it that I’m always exposed to humorous things and I’m becoming desensitized?

Example: While this is still funny, this no longer is, and I used to love that comic.