The celibate clergy are a vast minority
It is estimated that 100 million people at any given time are "getting
busy" (clearly most of them aren't married - KIDDING!). No, don't ask
me how whoever it was figured that out. But with 6.7 billion humans
and rising - not to mention the trillions of other living species on this
planet - clearly most minds and bodies are focused on passing along
their DNA.
But to clrify, I didn't say that there aren't bigger and better things than
reproducing in this Cosmos, but on Earth it is the Number One Sport.