i agree with the St Andrews cross theory...while i have been known to escape a few of Masters bondage attempts myself, i have never been able to struggle free from the cross. He likes it because i am secured and he can still easily access anywhere He wants to. also, i have not been able to escape when He has me tied spread eagle to the bed posts...if He ties my wrists together, i can get out but if he ties them seperately and apart from each other, no matter how i struggle, i just can not get out...Yet!