This. Anything else seems … weird, very complicated, and unnecessary. I agree not rinsing might be better for leaving more of the coating on the teeth, but the flavors are so detestable I can’t see not rinsing. Hell, I rinse thoroughly after using mouthwash; can’t stand the taste or burn of any of them.
Italics mine.
No, they do that because it demonstrates using about 10-15x as much as you need. And if just a few percent of users fall for that, they’ve doubled their sales.
A cup. A germ ridden disgusting never that clean cup that should have been thrown away 30 years ago. Doesn’t everyone?
I use a cupped hand.
It would be way more complicated twist in a way that gets my head up to my bathroom faucet than to stick my hand under there.
I’ll admit I do. It’s pretty much the only culture I get. 
I am squicked out by the thought of not rinsing just because it’s not only toothpaste residue, it’s dirty mouth crud residue. I want a rinsed, fresh mouth.
I’m also on the “stick my head under the faucet” team.
Head under faucet. It never occurred to me that anyone would use their hand.
Barbarians.
I wasted so much AquaFresh as a kid trying to get that perfect “swirl” of toothpaste on the brush.
Even though I’ll have a cup there for a rinse before I start I’ve been using my hand all my life and that’s what I’ll do when I’m done. Not worth changing the habit at this point.
Our bathroom sink faucet doesn’t extend out far enough, not to mention I am not terribly tall at 5’6" but too tall to stoop that low if the faucet did extend far enough. I just use my cupped hand to rinse my mouth out after I take my teeth out for the night.
Yeah, just hold my lips tot he stream of water, and rinse my chin if there’s any foam on it.
Yeah, I think enough of us do that that it should’ve been a poll option.
To be fair, brushing ones teeth has always been a sloppy process. From the back spray on the mirror to the dried paste (that you missed from last time) on the side of the sink. I don’t see sticking ones hand under the sink any more sloppy than that.
I use my hand to cup the water so that I can rinse my mouth. I can’t imagine not rinsing my mouth after brushing my teeth. I have to get all the foamy toothpaste gunk out of my mouth. I’ll use a cup if one is available, but I won’t make sure one is there before I start brushing my teeth.
I like brushing my teeth in the shower, too, so I’ll rinse my mouth by catching water from the showerhead.
Brush, spit, rinse brush, use brush to clean off residual paste, spit, rinse brush, done.
Wow, I’m fascinated by all the different ways people rinse after brushing! Who woulda think?
I’m happy to discover that apparently bending your head under the faucet is pretty common, because my husband does this and I’ve always found it SUPER weird and off-putting. Now I can just remind myself of this when I get squicked out. 
I just can’t conceive of personally doing this because if I don’t have it tied back, it’d be a pain making sure my hair didn’t slide down and get doused with water.
I don’t actually rinse-rinse. I spit the toothpaste foam out and drink some water from The Bathroom Cup* while rinsing the brush under running water. Then I either use leftover water in the cup or fill it a bit again to pour around the basin to rinse it out.
- we rotate through several so they get cleaned frequently. It HAS to be plastic, though, so it doesn’t break if it gets knocked over.
Well, I have long hair, and it’s always tied back during the day, so the reaching-my-head-under-the-tap thing isn’t too much trouble. I usually untie my hair before going to bed, after I’ve brushed my teeth.
I rinse, using a plastic cup. I’m not sure where the argument comes from that it’s wasteful. Because using a one-use paper cup? I can use the same plastic cup indefinitely long. They’re washable.
Exactly this.
I used to do it with my hand under the faucet, but that was when we had a faucet tall enough for that; at Mom’s parents it was always a glass because the only faucet tall enough was the one in the kitchen. Will use the hand if there are no glasses available.