From my memories of once being an 11 yo girl, 11 yo boys have always been strange. Based on my observations since then, I don’t think they get less weird as they age, I think they just learn to cover up their weirdness to better conform to social norms.

On the other hand, girls are weird too. We just tend to be weird in different ways. Basically, humanity is a set of unique oddballs. A “normal” person would actually be an abnormality.

I have a 5th grader who turns 11 next month. When he and his friends are together they don’t even appear to be human.

I think not all, OP. Just the strange ones.

13 year old and YES!!! VERY
My brothers won't as strange...

Plenty of people think middle-aged women are strange.

I have an 11 year old girl, and know several 11 year old boys (and have known them since they were babies). And a lot of 11 year old girls as well

They are all weird to me. I think it's because in someways their reasoning and logic is pretty mature - they understand cause and effect and how to treat people etc, and in other ways, it's completely off the wall and fantastical like a small child.

Plus Italian brain rot.

This is all assuming that it's harmless weird stuff - not torturing small animals and all that.