Gene Roddenberry Was A Humanist

The Great Bird of the Galaxy, the affectionate nickname for Star Trek writer and creator Gene Roddenberry, was a humanist.  This means that he didn't subscribe to any organized religion like Catholicism, but he felt strongly that the human race should prize reason, logic and the human faculty of intelligence above all other mythological or spiritual conventions.  Roddenberry infused humanist elements into his sci-fi show.

In dealings with sex, sexuality and the ways in which the human race approach procreation, a humanist view assumes that barring the complex issue of overpopulation or venereal disease, human sexuality is a healthy and enjoyable aspect of the species.  When examining the many alien species which populated Star Trek, there's more than a hint of exploring the myriad of human sexual relations.

Take for instance, the Vulcans. Spock, always a highly restrained and self controlled individual, becomes a broken and desperate man when he has to mate in the classic episode, Amok Time.  He must face his Captain in a battle of the death - all to win the amorous hand of a manipulative Vulcan woman named T'Pring.  Here, we clearly see that no amount of prayer or religious thinking will ward off Spock's sexually fueled passions.  It's overpowering biology that rules the day, and in the end, Spock's exploring it fulfills the needs of his alien anatomy, albeit with Captain Kirk nearly paying with his life by engaging in a death battle with his first officer.