I'm 31 and I've never done anything...literally.?

Why does it matter. Everyone's lives are different maybe you were meant to do stuff later.

I've heard of people older than you not doing any of that. I didn't have sex until I was 27. I did smoke and drink when I was 15 though but you should never do that anyway. There isn't a normal anything, it might be unusual but you're not the only one. I don't think my 59 year old Auntie as ever had a boyfriend, my Mother says she hasn't seen any men around her, and I've never seen her with a man my whole life and I'm 33.

Just because you haven't does those things doesn't make you weird at all. If you feel that it's becoming a problem and impacting your social life then maybe take some steps to do those things. If you just aren't interested in all that then that's your choice and live your life without worrying if people think you're weird.

Huh, I'm turning 21, same boat except for a few things,