[dudleypippin]

As my younger brother told me once, “Remember, the ‘nurture’ you got was different than the ‘nurture’ I got, simply because you were around.”

My older kid explicitly declined to pick up a hobby that she seemed to be interested in because, “oh, that’s $YOUNGERSIB’s thing.”

[renerthr]

Some days ago I found a comment here in HN talking exactly about that, how siblings want to differentiate from each other. It would be nice if someone finds an actual research paper that delves into this.