I'm sorry, but I wholeheartedly disagree.
Contorting is contorting, and it can be done regardless of the type of embrace. Bad posture, bad technique, bad dancing...are all bad regardless of which style or which embrace is being used.
It is entirely possible to dance--and dance at a high skill level--with the woman's hand draped around his neck, or down across his back, or along his back/side on the right, or on his arm. So much depends on what feels comfortable in any particular partnership--relative heights, body shapes, what things tend to be danced...the list goes on and on. The point is, is that it is all possible regardless of where/how she (or he) uses her arms...provided that it is done well, with good technique.
If her technique is bad, and she hangs off his neck with the draped arm...it's not the style and placement that's at fault, it's her technique.