The honey bee gets some food and the plant gets pollinated. All that pollen will be taken back to the hive for the bees' use. The honey bee is a messy gatherer of food, and some pollen gets stuck on the hairs of its body. The bee does not make any effort to put the pollen in the right place. Bees also gather pollen from corn, but the corn gets nothing in return.
Corn is pollinated by the wind.
That's the flower's way of assuring that its pollen gets attached to an insect for transfer to another flower. The bees don't like being slapped in the face, so they usually find some other kind of plant to get nectar. Some of the bees learn to chew a hole in the side of the flower and get to the nectar through this side door. When they do that, pollination does not occur because the pollen on the bee does not reach the top of the stigma. So it seems that the only reason a bee visits a flower is to get what it wants and not to perform a pollination service.