Definitions by ZerophiliacsHaveMoreFun

Zerophilia 

Zerophilia is a rare genetic condition affecting those who possess an extra "Z" chromosome, in addition to the standard gender-determining X and Y chromosomes. Following their first experience of sexual intercourse, Zerophiliacs may change gender whenever they are sexually aroused.

Since Sean has Zerophilia, he fears if he has sex with his girlfriend, he'll wake up in the morning as Shauna.

Zerophilia by ZerophiliacsHaveMoreFun January 2, 2010

Zerophiliac 

Any person with Zerophilia, the rare genetic condition affecting those who possess an extra "Z" chromosome in addition to the standard gender-determining X and Y chromosomes. Following their first experience of sexual intercourse, Zerophiliacs may change gender whenever they are sexually aroused. The International Organization of Zerophiliacs provides testing services and resources for those with Zerophilia.

When she noticed her boyfriend, Jake's, penis occasionally disappeared, Mary submitted his hair for testing to The International Organization of Zerophiliacs and confirmed her hopes: Jake is a Zerophiliac.

Zerophiliac by ZerophiliacsHaveMoreFun January 2, 2010