[i really don’t get the drunk thing. i just think if i’d had sex with someone whilst drunk then regretted it later i wouldn’t see it as rape because i’d still consented at the time and the other person can’t read my future mind. like if i was happy could i say someone raped me because i wouldn’t have had sex if i was sad? it really confuses me!]
Waking up the next day knowing you were raped is not the same thing as regretting consensual sex. Someone who freely gave consent and was not in any way coerced is more than likely not going to say later that it was rape. That would be a false rape accusation. And the amount of unfounded rape accusations (which includes false accusations as well as cases where the police could not find enough evidence, etc) is around 8-10%.
I don’t know how to explain this any clearer to folks. People who genuinely consented to sex do not later think, ‘hey, maybe I shouldn’t have consented, I think I’ll claim rape.’ And the difference between two moods such as happy and sad (unless we’re talking about a psych condition), is not the same thing as being under the influence of alcohol, which alters your perception and function.