Since my brother is visiting us along with his family for our annual bout of sibling revelry, here's a reminiscence about the daily bouts of sibling rivalry that occured when we were young and together.
Anything and everything edible given to us had to be shared equally. I was the more pugnacious of the two, and would set out complicated rules and regulations dictating the terms and conditions of the partition of every single morsel that came our way.
If there were two separate but similar things, like say, two toffees, then, obviously there were no problems. Each one eat one - was the rule.
If it was one piece of something which had to be divided equally, like say, a piece of cake, then the rulebook (authored by me) said - one of us would divide the cake (or cutlet, or...) and the other would choose his portion first. The rule was scrupulously fair in its nitpicking - the person cutting the piece would be very careful to cut it equally, because otherwise the other would get to choose the bigger piece.
The even more complicated rule for things that came in uneven sizes and in larger numbers (a bunch of grapes, or a bowl full of berries, maybe) was : the first person would take only one, the second would take two, and then the first would take another. Then this cycle would be repeated again and again till the entire loot was evenly distributed. WHY this particularly complex process, you may wonder. This was because the first person would usually end up getting the biggest piece (chosen first) and the fourth-largest piece, and the other one would get the second and third-largest piece. Now 1+4 equals 2+3, and although we never had weighing scales, we never had any complaints about unfairness either.
Ah, the deviousness of dharma (justice/righteousness)! Later on, when I read/saw the Mahabharata, I was amazed at the complicated routes taken by the righteous to achieve the victory of virtue. And, of course, I felt completely vindicated in my rule-setting, although everybody else felt otherwise, including my brother.
DID YOU HAVE ANY SUCH CONSTITUTIONAL RULES LAID DOWN FOR YOUR SIBLING?