Except most women will never develop unsightly lats biceps or traps without drugs. In fact if they do train these they are going to have a far better shape than if they skip upper body. They won't have large muscles, it just doesn't happen, but it will look a lot better than some nasty bony straight arms, there will be a little something there, and it looks much better than some flimsy weak looking woman.
On an unrelated note my wife did her first full unassisted pull up last night, 4 singles, clean and full range of motion without any hopping or kipping crap. Took a pick and her back looks great, lean and defined, nothing even remotely not sexy about it, it is very sexy.