My dad was adamant about teeth brushing in our home as far back as I can remember. When we where little he used to do teeth inspections after dinner and make me give a big toothy grin

to see how well we brushed our teeth.
He was this way because when he was younger he was in a car accident knocking out practically all of his teeth. He had to deal with dentures at a very young age (26) and hated them tremendously. So he made sure his kids never had to deal with the pain of teeth problems. Even now I brush twice daily and make sure its the last thing I do before bed.
I don't know how people can just go to bed after eating and not brush their teeth, leaving them nasty all night long..lol.. drives me crazy if I don't get to brush them.