With brothers you become friends. Some you hang out with more than others. You talk to one about the other a little more. You get mad at them. Then, you love them. Then, you apologize. You have to apologize whether you want to or not. You have to. That's your brother.
The fact is that love is of two kinds, one which commands, and one which obeys. The two are quite distinct, and the passion to which the one gives rise is not the passion of the other.
The men were all scumbags, but the whole point of the film is to show the development of that. Each guy is going in there to have a good time. By and large, these men are career men, family men, and you just see the deterioration of them.

