 In adopting this conclusion I follow closely my noble and learned friends Lord Templeman and Lord Jauncey.What the appellants are obliged to propose is that the deliberate and painful infliction of physical injury should be exempted from the operation of statutory provisions the object of which is to prevent or punish that very thing, the reason for the proposed exemption being that both those who will inflict and those who will suffer the injury wish to satisfy a perverted and depraved sexual desire.Sado-masochistic homosexual activity cannot be regarded as conducive to the enhancement or enjoyment of family life or conducive to the welfare of society.