In the Sign of the Virgin

In this classic from the Danish erotica collection, a town is overrun by horniness when a sex-minded professor accidentally exchanges a briefcase containing his own powder--an intense aphrodisiac--with a briefcase containing a hormone-curbing powder designed by the heads of an all-girl private school to counteract the effects of planet Venus’s alignment with Earth. After the love drug is unwittingly administered to the female students, the rest is dumped into the town reservoir, sending everyone on a trip to the local brothel. (official distributor synopsis)