"Bees actively seek out drugs such as nicotine and caffeine when given the choice and even self-medicate with nicotine when sick. Male fruit flies stressed by being deprived of mating opportunities prefer food containing alcohol ...."
--Lars Chittka, "The Inner Lives of Insects," Scientific American, July 2023.

IMHO, conclusive proof of insects' intelligence. Now I want to know if a caffeinated bee mutters "loser" when she flies by a male fruit fly drowning his sorrows in a rotten apricot.