The text below is from an exhibit featured at the Museum of Jurassic Technology in Culver City, CA. I visited about a month after arriving in the state.
J.F.M. Hoeniger, (General Microbiology 32:30, 1965.) suggests that the explanation for this practice of administering ants eggs to one afflicted with (and desiring to fall out of) love lies in the chemical composition of ant eggs or more precisely and pupae. The sack or membranous tissue which encloses the pupae contains measurable quantities of the naloxone hydrochloride which exhibits marked anendorfic (endorfin inhibiting) qualities by effectively blocking the opiod receptor sites in the brain without producing the agonistic response (cell excitation) which typically results from the endorfin bond with the receptor sites produced in the "love" or other endorfin producing states.