When I found this little bee he was so deep inside this lobelia bloom I saw only the very tip of his backside. He eventually backed out slowly and proceeded to meticulously clean off his tongue. I had never seen a bee's tongue; it was fascinating.
Its reddish-colored tongue (which basically acts as a straw and is covered with fine hairs which swab up nectar) is used to reach the nectary, found deep inside the flower. The nectary, you've probably guessed, is the part of the flower which stores nectar.
After observing him for a few seconds I discovered he was specifically interested in cleaning his maxillae, the sheath-like covering out of which his tongue protrudes, repeatedly swiping at what looks much like a tiny beak with his forelegs.
When he was satisfied, he returned to his task in the nectary...paying me no attention at all. ♥