By the way, they don't marry multiple wives. That's some crazy cult spinoff group.
Also, the point of multiple wives is so you can get them all pregnant all the time, churn out twenty kids, and then have an army for storming the neighbors' houses.
And also, so you know, The answer is "the fourth one". That is the one I would have done it with, even though I have not, in fact, done that disgusting thing.
And one last thing, my name is boob. Joeb is how we spell boob in my culture. What culture is that you ask? The culture of the joeb, of course.