So I've looked through the literature and I found a review article saying all of this and more. It was written by a group of respected physicians from American and French hospitals and it clearly supported the widely held belief that you should drink two to three litres of water a day.
This is a common occurrence to have your brood chamber become honey bound during the main nectar flow. A typical hive body will have a brood cluster in the middle and the outside frames will contain honey. A honey bound hive happens when brood begins to emerge, it is replaced with nectar.
They drink nectar from flowers, put it in a honey sac inside their body and come back to the hive. The bees give nectar and pollen to other bees in the hive. They chew it and make honey and bees wax out of it. They put the honey in the hive for the larvae to eat. They also keep enemies away from the hive.