hello willow i have ocd and i always wash my hands ater i touch something i feel needs to be washed aterwards.i would say it is an ocd tendency you have,but ocd works in different ways for different people,depending on what bothers them.contamination issues are common but the actual rituals can vary,i wouldnt do the cleaning teeth thing ,id do something else.i agree with the others that you should try and resist the ritual ,i have overcome certain rituals by resisting and staying with it.it might not be easy but it can get better.hoped ive helped in some way ,all the best ,paul