I have a family member who rarely brushes his teeth. And almost never flosses. Once in a while he’ll use mouthwash. But brushing only happens about six times a year; twice before going to the dentist (so the hygienist shouldn’t yell at him) and a few other times randomly spread out during the year (maybe before a close chasuna and another random time or two.)
Her goes twice a year to the dentist for a cleaning and checkup. Yet while the dentist keeps telling him to brush and floss twice a day, the dentist tells him each time his teeth are beautiful and healthy. Despite his having this practice of rarely brushing for probably close to a couple decades now.
I always wondered how he gets away with that without having dental problems.