One cannot use sex without the commitment to create. Choice, commitment, the service of life, all have to be woven into the life of a man and a woman who accept the teachings of Christ. It is evil to accept love without accepting as well the full consequences of that love. Sex is NOT evil. It IS good.
Sexual pleasure is good.
But to seek sexual pleasure, gratification, without the setting of a sacred and moral commitment of love is like mouthing words without any sound. The real problem in our society is that too many have confused affection and love - and the two are not at all the same.