Please settle a debate between me and a friend. After decades of friendship she has just revealed that her husband sometimes brushes her teeth for her! She says she sometimes doesn't have the energy after looking after young kids all day and it's nice to have someone take care of you. I felt physically repulsed! The idea of someone being that close to me, cleaning my teeth, peering into my mouth - I'm shuddering just typing this. Each of us thinks the other is being odd so...
YABU - a partner brushing your teeth is the highest level of intimacy that can be achieved
YANBU - it's an obscene act that shouldn't be talked about in polite society