The thing about consent is it isn’t a moment, it’s a process. You should be consenting the entire time you are having sex, screaming consent, whispering consent, consenting with your hands and mouth. And if this consent stops, you should too, at least long enough to find out why.
Moods can shift fast, especially late at night, even more so when drugs and alcohol are involved. Back when I was establishing my bonafides in drunken sexual encounters, it wasn’t uncommon for one of us to say mid-encounter “I’m too tired, I’m not feeling it anymore, let’s pick it up in the morning”. And it wasn’t a big deal because we were grownups and we liked each other. Even if we didn’t know each other well we’d established a strong rapport, or else I wouldn’t have been there.
Yes, there were times I consented to sex with someone I probably wouldn’t have slept with if I was stone-cold sober. I wasn’t taken advantage of, I knew what I was doing. But I realized I was hurting people, men who took the encounters way more seriously than I did and wanted more than a one night stand.
I really preferred the womanizers, we were on the same page and it was so much easier.
The point to that digression being that “intoxicated woman consenting to sex with someone she just met” does not always mean that someone took advantage of her. Some women like getting intoxicated and having sex.
But gaining consent isn’t just about getting to yes, it’s about staying at yes, and if someone is not responding they may not be consenting anymore.
But I agree that intoxication, in and of itself, does not make consensual sex rape. It can be hard to judge the intoxication level of another person, not everyone slurs and stumbles and starts dancing on tables.