"to evoke Sodom and Gomorrah"

Sodom and Gomorrah were two cities whose destruction is mentioned in the Bible, as well as the Koran and the Torah.  According to the Biblical account, the inhabitants' sexual immorality angered God and so he destroyed both cities.  Sodom has been taken as a byword for sexual perversity, and is the origin of the term "sodomy".

Sodom and Gomorrah by John Martin, 1852
Public DomainSodom and Gomorrah by John Martin, 1852