Other than age difference or gender (which I know are usually the biggest factors), WHY do you think you are close? Was it the way your parents raised you? Shared interests, or bonding experiences? Or do you have no clue?

If you are NOT close, why do you think that's the case?

I feel like a lot of threads about age gaps or siblings in general express a desire to have LOs be "close." Just wondering what fosters that closeness. Some people say they were/are close to siblings despite large age differences, and vice versa, so that clearly is not the only factor.

I feel close to my younger brother because we went through some hard experiences as young kids. I was protective of and maternal toward him. We fought a lot but we also played together, and as adults even though we are pretty different in some ways, I like his company