re: Broadway tunes
A working topical aphrodisiac has been a Holy Grail for chemistry since the first shaman started pounding roots on a rock. To use it in a battle situation would be like using the Philosopher's Stone to create solid-gold tanks too heavy to move.
Besides, we are reliably informed that there are no gays in the Middle East, so the whole thing would be a dud anyway.
Of course, if you applied it while the enemy was near a herd of sheep...