Lol what the fuck?

Well...I guess it's only fair to consider nipples on a man as partial nudity as well xD. Equality!

Well, it depends what you mean by mature exactly. ESRB rates on content more than the themes.

Yeah, that's a good point.

Case in point :

Just to clear this up: They're not saying that Super Mario Odyssey has profanity or sexual content. Those are just examples of tags that get a game pushed up to B in the CERO scale.

Looking at the ESRB description, the game merely contains "Cartoon Violence" and "Comic Mischief".

https://www.esrb.org/ratings/Synopsis.aspx?Certificate=35042&Title=Super+Mario+Odyssey

And the original game was actually rated E, as there was no E10 rating at the time.

Snatcher is rated T, and shows a decapitated head.

It's due to Mario being shirtless for the first time. #FreetheNipple

The old Nintendo probably would have censored Mario chest.
What a fall from grace.

Hmmm. There might be hope yet. That's a good thing in my opinion.