I was talking to my friend that breed orchids, and he said that even though it is physically painful for the wasps that pollenate orchids, they keep coming back because the pollen acts as a drug.
I was watching flies in my greenhouse sucking Sar juice, and falling in. Everyone in a while, one would escape. They just fly around drunkenly and then come back for more.
I am sure that the nectar-secretion of Sars must bring some sort of buzz or stupor to the flies. Does anyone know of studies?