Why does everyone take every single thing in their lives so seriously?

I feel like I live in a completely different way to most of my friends. (Only the two of my closest friends agree with me actually)

Anecdote 1, when one of my friends posted one of his drawings on instagram, it was a sketch of a woman. I commented, "She's pretty, but I know you are prettier!", he immediately messaged me that I should delete my comment.

Anecdote 2, I changed my discord status to "Addicted to ". He immediately messaged me saying that it's weird and that his girlfriend might see it.

Anecdote 3, One of my mutual friends who is pretty feminine posted an image of him and his legs were pretty far apart. So I commented "Spread those legs for me too"
He removed my comment and blocked me.

And these are just from the past few months. Writing this, I feel like I am the one who is taking things too seriously to be honest.

But seriously, I think that everything can be joked about and I do treat everything as such. I don't get angry or defensive over light ribbing (At least I would like to believe so) and I get when someone is being sincere and when they're being sarcastic. Feel like it'd be such a drag to treat every single bad thing which happens in their life seriously. Don't these people ever just laugh?