Jonas I think cuffs would be too restrictive overnight
Sure, it's nothing for over the night, just for the cleaning process. It could also cut the skin when trying to wear it overnight.
Tighbands?
holders might fear that the chaste person might be able to slide a finer under the shield, or any thin pencil or something like that. If you hold a vibrator to the stiff pencil then ...
But for men this obviously doesn't work - sure - to prevent him spreading the legs it would be useful ... that's bondage/restriction then. Therefore they are very useful. If she doesn't like your fighting she might also just hogtie you...