Well you have to become a contortionist!
Its s*d’s law that the dress you really want has a zipper, with a tiny, tiny pull thing that you can barely get hold of. Of course it is just a sort of tear drop shape that you can’t attach anything too, well not easily. The maker also chooses a tightly meshing zip whose teeth grip like a crocodiles. Quite likely it is also a dress with no stretch, and vanity has made you buy one size smaller than you should have.
Nature has blessed you with a larger ribcage than the dress was designed for. So although you have used Grace’s technique you reach a point where the zip won’t quite mesh.
You walk your fingers like spiders down to find the pull. That’s when the contortionist comes into play. After a struggle in which you try both hands, standing on one foot, uttering some unladylike words through gritted teeth, that it finally gives in and slides up.
Have you noticed that it always leaves quite a gap behind your neck?
All you’ve got do now is do everything in reverse to get the dress off again!
Is that a car pulling up on the drive?