I've been thinking a lot about this today. There were times when on vaction where one of us must have been beyond puberty that my brother and I slept in the same bed. I can't say that I enjoyed it as he is a flailer and snores.
When my brother and I are both home, it's not unheard of for us to go upstairs and lay in bed with my mother and talk. We don't do this when Dad is there, just mom, but we have since we were tiny. We don't sleep with her, just lay with her before we go to bed (Dad usually goes to bed much later than my mom). I'm 28 and my brother is 26.
When Jacob was 3 weeks old and Dennis had to go away for work, my mother came and stayed with us. We all slept in the same bed rather than hauling out the air mattress.
Maybe we
are weird, but I think we're just close to our mother. I hope I'll always have that sort of relationship with my sons.
And I do not, have not and never will think of my brother in a sexual way

.