<human>: Could you distill the essence of the text into 1-3 sentences?

There are two main issues which I think might make us weird. Just wanted to get some input.

1 - In our entire lives, I don't think we've ever had a serious conversation. 99.99% of our interactions involve us joking around, playfully insulting each other, etc. Maybe once in a blue moon we'll have a semi-serious conversation, but I don't think I even remember the last one. I'm pretty sure we've never had a serious conversation. It would be beyond awkward. It's just how we are.

2 - If we see each other in public, we don't acknowledge each other. Like if I see him at the mall and we pass by each other, we won't say hi. Maybe we'll make eye contact for a split second but we never interact. Sometimes we don't make eye contact at all. Again, it would be too awkward.

We're both kind of awkward in terms of personality. I'm not really bothered by any of this. It's just the way things are. I wanted to ask if any of you had this kind of sibling relationship and if it's common at all.
<bot>: Brother and I have never had a serious conversation, we don't acknowledge each other in public, is this sibling relationship common?