Good topic. I like being strapped to a bondage table at down times in long sessions. Extensive bondage, combined with mild stimulation, such as a low does of electricity sends me into a sleep like zone. For intense CP, like being upright, either with my feet flat on the ground and arms spread eagle over head, or upside down in suspension. I'm of fan of the St. Andrews cross either. I never thought of it from the Mistress's swing point, only a place of comfort for myself. But, what you've said makes sense.