A user of 4chan's /a/ board, who, starting October 2010, started writing a story where he was inspired to brush his little sister's teeth after watching Nisemonogatari's infamous toothbrush scene. Eventually, it got to the point that they married and had a child together. He kept posting for about 3 years, until August 2013, when he was never heard from again. Nobody knows if the story is real, but nobody can prove that it's false either.
Aidan: "yo have you heard of that one Oral Hygiene Bro who fucked his sister"
Bob: "Yeah that's some messed up shit"
The Hot Girls at the Dentist Office who clean your teeth and tell you to brush more often. They accidentally brush their breasts against you and use the suction too.
A dental hygienist is the cute blonde who cleans your teeth every 6 mos. that you secretely have a crush on.
2. The conditions or practices conducive to maintaining social health, positive social relationships, and interpersonal well-being, as well as preventing isolation, loneliness, and relationship weakening or loss, especially through community formation and engagement
I'm going to spend my weekend emailing, texting, calling friends I haven't talked to in a while – keeping-up my connection hygiene.