Whatever the reason, it does create a rather attractive appearance, don't you think?
Indeed. And if you did, few would believe you.
> Some of the older philosophers contended that by the presence of two breasts woman was originally intended to bear two children.
Two breasts allows twins to survive better, but it also gives a survival advantage to one child in case one breast has trouble (which happens very often). I suspect it's a combination of redundancy and symmetry, rather like having two kidneys.
Whatever the reason, it does create a rather attractive appearance, don't you think?