We have a nighttime tooth brushing routine around here that seems to work pretty well. First, the boys get Agent Cool Blue rinse, then they brush and floss, and then they get fluoride rinse. The oldest likes mint fluoride, while the seven year old prefers bubble gum. For a while, the four year old used the bubble gum. Then he decided he didn't like it, and switched to mint. I thought nothing of it until I found out the reason.
Apparently, as I was told last night, he stopped liking the bubble gum because it's pink. And pink is for girls. And he is not a girl.