If a sixteen year old girl claims rape after having sex, its rape, even if its not really rape.
Don't have sex with anyone under 18 idiots, it's legally rape.
Also, drunk consent at age 16 is worth nothing, actually, its probably worth less than nothing. If you have sex with a 16 year old stoned drunk girl, expect her to claim rape, as she probably should. Also, even if she claims it was consensual it doesn't matter, having sex with someone under 18 is automatically a form of rape. (legally, and in my opinion, ethically and morally)