Caffeine doesn’t affect me?

Okay so caffeine doesn’t affect me like at all??? I can drink cup after cup after cup of coffee and won’t feel a thing. I know some people feel very energetic and more awake when they consume caffeine. I literally don’t feel a thing. I don’t get that energetic feeling. I literally just feel the same. The only thing coffee make me do is poop 😂.

Does anybody know why this is?