1 Corinthians 12:22-25

22But quite the contrary, the parts of the body that seem to be weaker are [absolutely] necessary;

23and as for those parts of the body which we consider less honorable, these we treat with greater honor; and our less presentable parts are treated with greater modesty,

24while our more presentable parts do not require it. But God has combined the [whole] body, giving greater honor to that part which lacks it,

25so that there would be no division or discord in the body [that is, lack of adaptation of the parts to each other], but that the parts may have the same concern for one another.