Sex Education The subject of sex is so surrounded by superstitions and taboos that I approach it with trepidation. I fear lest those readers who have hitherto accepted my principles may suspect them when they are applied in this sphere; they may have admitted readily enough that fearlessness and freedom are good for a child, and yet desire where sex is concerned to impose slavery and terror. I cannot so limit principles which I believe to be sound, and I shall treat sex exactly as I have treated other impulses which make up a human character.