I've been told to spit out the extra, but dont rinse. It's supposed to help your teeth absorb the fluoride. Also been told not to eat or drink for about 20 minutes after, not just for fluoride aborption, but because brushing gets rid of a protective film over the teeth and they are more prone to wear and tear until it's built up again.
It's how I learned it but it turns out... the most health benefit from tooth paste comes from not rinsing it out. The fluorides do better work that way. Also the main reason why you should brush 3 minutes. No mechanical or cleaning reason. It's to keep the fluorides on them.
I still rinse, but as of late have taken to using mouthwash between meals each day.
The mint hurts my mouth. I use a specific toothpaste, but I've used many kinds, they all hurt the inside of my mouth. I have to rinse to make it stop. Idk if other people think tooth paste hurts. My dentist compliments me on my teeth, they are not in terrible shape, my teeth dont hurt, its my mouth. idk what it is that makes toothpaste hurt but I have to compulsively rinse.