CMV: If you, while not intoxicated, cannot verbally express a lack of consent or desire to cease sexual activity, you should not be sexually active.

So, I was reading this article about how consensual sex can still be rape:

“You OK?” a boy asks me in the middle of consensual sex. His hands are firm on my hips, his breathing ragged in my ear. I turn my head to the side, twist my mouth into a grimace. He’s having trouble getting off, he tells me. He’ll finish soon, he promises. One quick thrust.

“It hurts,” I tell him.

“You want to stop?” He says without pausing. There's a slight annoyance in his voice as he continues, “I’m really close.”

I don’t remember the feel of this boy’s hands, I don’t remember his caresses or kisses, I don’t remember the words he said to me before we started having sex. I do remember his heaviness pressed against me, the way he pinned me down by the very act of what we we're doing; his erratic, persistent, insistent movements, his loud pleasure and my pain. I remember speaking this quiet, muffled answer: “Kind of.” But it’s unclear — I will remind myself later, for days, for weeks, for years — what exactly I have said "kind of" to. It’s too noncommittal, and it’s too late.

“Just let me finish,” he says. “It won’t be much longer.” He hurries and then he comes. He's slumping on top of me, and though I'm not sure why, I’m starting to cry. When he sees me, he's angry. Why didn’t I tell him I was crying, and why didn’t I say I wanted him to stop? He feels weird now; he feels guilty. I have ruined this for him. I am always ruining things for him.

https://www.bustle.com/articles/135171-i-didnt-say-no-but-it-was-still-rape

And the same woman says this at the end of the article:

"Rape" covers a multitude of experiences; it is gray and blurry and messy. In calling what happened to me “rape,” it now has a name that takes the responsibility off of me and puts it on someone else, regardless of whether that person goes to prison for it or not.

My view is, as an example in this article, if one feels they cannot express a lack of consent, in any form of verbal or physical resistance, they should not be having sex. You must be responsible for your own desire to consent or revoke consent to sex. This is even more unacceptable when you are asked for consent but cannot articulate your revoking of consent.

Just like in medical procedures and visits, you have to be of sound mind to consent to medical treatment. If you can't, you need a legal guardian to consent and make decisions for you.