Useful or just about power
In the Japanese culture during certain times it was acceptable for men to have concubines. It was a ritual full of mannerisms and protocol. On one level this ritual had its place. I'm sure the men could be more honest with the concubines, feeling free to release pent up inhibitions and being catered to in an acceptable way. Yes on one level it was okay. On another level it’s a similar story, that of men asserting their beings and power in a system that allows for them to get all they can. They are simply out for themselves, and sophisticated rituals don't alter this fact. Instead of being humbled by their needs and selfishness, they are comforted and stroked.