1. I suppose it's to make clear their intentions("I will only look at what is necessary when it's necessary") and maintain a sense of decorum.

3. That's a myth. Many women can and in fact it's a lesson taught in some finishing schools!

7. It must be a case in some cultures. I always call them stairs wherever they are placed.

9. FDA regulations must have something to do with it. Ditto for honey!

10. A very very minority of people do like their toasts well done so to speak.