For yet another example, if I as a sober male have sex with a drunk-as-a-skunk female at a party, I can be charged with rape even if she initiated the act. She was inebriated to the point of being unable to give informed consent - if she has day-after regrets, I'm screwed.
Is this true in most countries? If so, it seems horrendously unjust to me. That she initiated the act whilst pissed does not absolve her of responsibility for the act, any more than she would be absolved of responsibility if she murdered someone, robbed a house or vandalised someone's property whilst drunk. She was under no compulsion to put herself in a state of diminished reason.