“The dignity of marriage
”‘For this reason a man will leave his father and mother and be united to his wife, and the two will become one flesh.’ This is a profound mystery - but I am talking about Christ and the church." (Ephesians 5:31:32) The separation of love and life is always immoral. This is done by being closed to either one, or both, when using (or abusing) our sexual faculties:
Contraception, onanism, perversion, masturbation, casual sex-without-commitment, even sex-without-love between married people.
"Anyone who looks at a woman lustfully has already committed adultery with her in his heart. (Matthew 5:28)
“If a man looks at his wife with lust, he has committed adultery in his heart” - Pope John Paul II .
Lust is not just sexual desire, it is sexual desire with no regard for the personhood of the other. It treats the other as a sex object, for the purpose of self-gratification. In a case of lust, the person does not matter. Sexual desire between married people expressing their love is a blessing. (See Genesis 1:28)."
to the statements discussed-
The first one, well- could it fall into “masturbation”? as contraceptive (articficial e.g. condoms) are classified under- then it would be against catholic morality, or if sexuality is sought without unitive, or pro creative aspects, i.e. for pleasure itself.
for the second:
"2354 Pornography consists in removing real or simulated sexual acts from the intimacy of the partners, in order to display them deliberately to third parties. It offends against chastity because it perverts the conjugal act, the intimate giving of spouses to each other. It does grave injury to the dignity of its participants (actors, vendors, the public), since each one becomes an object of base pleasure and illicit profit for others. It immerses all who are involved in the illusion of a fantasy world. It is a grave offense. Civil authorities should prevent the production and distribution of pornographic materials. "
I would think descriptions fall into it, but I can err.
as to the third,
"2362 "The acts in marriage by which the intimate and chaste union of the spouses takes place are noble and honorable; the truly human performance of these acts fosters the self-giving they signify and enriches the spouses in joy and gratitude."144 Sexuality is a source of joy and pleasure: "
is this the result of good, catholic representation of God’s interaction within the trinity, does God talk dirty- it is of course known that the Father and son spirate the Spirit, and sexuality is a manifestation of God’s joy in creating, us, and spirating the Spirit, who is love, and God, by the Father and Son.
as to the forth
"The lust of the flesh directs these desires, however, to satisfaction of the body, often at the cost of a real and full communion of persons. In this sense, attention should be paid to the way in which semantic accentuations are distributed in the verses of Genesis 3. Although there are few of them, they reveal interior consistency. The man seems to feel ashamed of his own body with particular intensity: “I was afraid, because I was naked, and I hid myself” (Gn 3:10). These words emphasize the metaphysical character of shame. At the same time, for the man, shame united with lust will become an impulse to “dominate” the woman. (“he shall rule over you.”)"
and seeing Aquinas
"I answer that, A thing is said to be a mortal works. sin in two ways. First, by reason of its species, and in this way a kiss, caress, or touch does not, of its very nature, imply a mortal sin, for it is possible to do such things without lustful pleasure, either as being the custom of one’s country, or on account of some obligation or reasonable cause. Secondly, a thing is said to be a mortal sin by reason of its cause: thus he who gives an alms, in order to lead someone into heresy, sins mortally on account of his corrupt intention. Now it has been stated above (I-II, 74, 8), that it is a mortal sin not only to consent to the act, but also to the delectation of a mortal sin. Wherefore since fornication is a mortal sin, and much more so the other kinds of lust, it follows that in such like sins not only consent to the act but also consent to the pleasure is a mortal sin. Consequently, when these kisses and caresses are done for this delectation, it follows that they are mortal sins, and only in this way are they said to be lustful. Therefore in so far as they are lustful, they are mortal sins. "
there is motives involved,
further, John Paul states what I shall quote again
“If a man looks at his wife with lust, he has committed adultery in his heart”