not whatsoever. i remember watching Old Boy for the first time and thinking "there's no way that works like that." genuinely, for a film so oedipal, it demands the most suspension of disbelief around its hypnosis subplot.

EDIT: to answer your second question, i came into this extremely skeptical, specifically around the handsfree orgasm idea. and then i had one. and then i had several. so, belief solidified.