Pangaea

From Thikipedia

Pangaea (from Greek παν pan all + γαιερ gayer homosexual) is an outbreak of homosexuality that spreads across a large region, or even worldwide.

It is believed that the world was in a state of pangaea when all the continents were joined at the point the Earth was formed. This is disputed, however, as reproduction would have been unlikely in such a homophilic environment.