Maggie's Farm

From Father to Son — J.R.R. Tolkien on Sex:

 “The devil is endlessly ingenious, and sex is his favorite subject,” Tolkien insisted. “He is as good every bit at catching you through generous romantic or tender motives, as through baser or more animal ones.” Thus, Tolkien advised his young son, then 21, that the sexual fantasies of the 20th century were demonic lies, intended to ensnare human beings. Sex was a trap, Tolkien warned, because human beings are capable of almost infinite rationalization in terms of sexual motives. Romantic love is not sufficient as a justification for sex, Tolkien understood.

Taking the point further, Tolkien warned his son that “friendship” between a young man and a young woman, supposedly free from sexual desire, would not remain untroubled by sexual attraction for long. At least one of the partners is almost certain to be inflamed with sexual passion, Tolkien advised. This is especially true among the young, for Tolkien believed that such friendships might be possible later in life, “when sex cools down.”