What an odd question. I honestly can say I've never heard of anybody brushing their teeth in the shower (except Kramer). I would not enjoy the hot water, I don't think..
As for the just standing around while you wait for the conditioner to work, that's when I wash my body, shave, and wash my face. Shower agenda, in order: Wash hair, condition hair, wash body, shave, wash face, rinse conditioner, done!
I suppose you could save the shaving for later, with an electric - but they do not shave close at all. I only use mine for shaving emergencies.
I do just as you do except I wash my face first.
