that's good

... it is porn made by you and your wife, or it is porn made by someone else. Eroticism is purely for the physical purpose and has nothing to do with the soul nor the other person. Eroticism hands itself directly to self gratification, because the flesh is selfish in nature. No amount of eroticism can make up for the pure intimacy of sexual relations. The only reason eroticism would be needed is if you are unresponsive to the natural sexual urges and feelings between you and your wife, in which case I would suggest this person has previous problems with pornography and/or sexual depravity in his past. You can think whatever you want to think, but do not dare to place your personal opinion that has no scriptural basis, and is infact against God's word, in the same vein as sex as God intended it.

[Personal attack removed by Admin.] Let's take a look at your first example. Making porn with your wife. the very nature of that comment denies it's place in holy matrimony. Porn is for the sole purpose of arousing a sexual response and has nothing to do with intimacy in marriage. It is not part of it, it is not pure, it is not scriptural, and it is wrong. There are grey areas in debates around small inconsequential things within scripture such as the eating of meat that was offered to idols, or listening to certain types of music, sexuality is not a grey area. Homosexuality is a sin. Lust is a sin. Coveting is a sin. Sex outside of marriage is a sin. Sex outside of your relationship with your wife is a sin. So from this we can clearly conclude that porn, (a device that is used simply for the arousal of oneself) is lustful in nature, and therefore sin. There are no arguments you could offer that even remotely reject this, whether,

Eroticism in the context of a "God approved" marriage;

There are guidelines that one who follows Christ should adhere to. For one, viewing pornography that other people have created is out. However, if you and your spouse consent to making your own, and is only to be viewed by yourselves, in the absence of all others, there is nothing sinful about that.
Remember, context is everything. And providing that both parties are monogomous, there shouldn't be anything wrong with whatever you do with your spouse. Including hot, erotic foreplay. With few exceptions, e.g. anal sex. This is biologically dangerous, and highly not recommended.

"Eroticism: The Fool’s Gold of Holy Sexuality" ?
You can't be serious. This is part of the problem with the church today. "We", rather many in the body of Christ, in trying to offer guidance in such areas of human interest are often a bit confused as to what the church's role is in educating itself on such issues. My position as one who follows Christ is, that eroticism in the context of a "God approved marriage", (and not simply heterosexual marriage), is a "necessary good." We should all want to sexually appeal to our spouse as much as that person who your spouse is sexually attracted to. And of course, you want your spouse to sexually appeal to you as much as that other person who does or may.
And being sexually attracted to someone does not necessarily
mean you lust for them; but rather if your circumstances were different, you might open the door for an intimate relationship with them. But within the context of marriage, sooner or later eroticism is a must.