I get your point (and agree with it), but I've got to tell you that having 4 wives just ain't gonna make you happy. Just remember that you can't spend all of your time in bed, you've got to deal with the rest - and add to the normal "rest" the jealousy of 3 of them at any one time. Good luck with that!
What are the chances of all 4 wives all having a headache at the same time?