Affection between bros
If I'm gonna hang with my bro, I want us both to feel comfortable enough with each other for anything. Talking about anything, helping each other out, and especially affection. If my bro needs to be held and comforted and have his hair played with, he should be completely comfortable to come to me for that. I see nothing wrong with two bros being affectionate like that. Cuddling, hugging, there's nothing weird about it.