Gay bomb.

From Box Turtle Bulletin:

Air Force Lab Suggests Development of “Gay Bomb”: 1994.  In a scenario that sounds more like a Monty Python skit than an actual proposal for warfare, an Air Force lab suggested the development of some highly unusual non-lethal chemical weapons. According to a memorandum dated June 1, 1994, he Air Force’s Wright Laboratory in Dayton, Ohio, sought the development “Harassing, annoying, and “bad guy” identifying chemicals.

Three classes of chemicals were proposed. The first consisted of “chemicals that attract annoying creatures to the enemy position and make the creatures aggressive or annoying.” Rodents and stinging and biting bugs were suggested as suitable targets. The second class of chemicals would “make lasting but non-lethal markings on the personnel,” making them “easily identifiable (by smell or appearance) weeks later, making it impossible for them to blend with the local population.” If the chemicals had an irritating or annoying factor, so much the better. But it was the third category that was oddest of all:

Category #3: Chemicals that effect [sic] human behavior so that discipline and morals in enemy units is adversely effected [sic]. One distasteful but completely non-lethal example would be strong aphrodisiacs, especially if the chemical also caused homosexual behavior. Another example would be a chemical that made personnel very sensitive to sunlight.

The brief memo conceded that such chemicals did not currently exist and “would need to be created. Manufacturing techniques would need to be developed for chemicals needed in large quantities.” Decontamination measures would also need to be developed. The entire development and testing program for all three categories of chemicals was projected to cost $7.5 million over six years, which was small potatoes for defense programs, even for 1994.

When news of the program broke in 2005, Marine Captain Daniel McSweeney told reporters that the memo was among hundreds of suggestions for non lethal weapons sent to the Pentagon each year, and said, “‘Gay Bomb’ is not our term. It was not taken seriously. It was not considered for further development.”