Salam to Abuayisha,

" What is your evidence that taking another wife for "lustful" reasons is prohibited in Islam?"

Exibit A- Quran

" "Say to the believing men that they cast down their looks and guard their private parts..." (24:30). "

First, it is well known that taking a "second look" at a non-muharam women or even a first look with the intention of seeing her "shape" (even if not covered) is haram. So, is it not logical to say that if looking with lust is forbidden then it can be assumed that marriage for this reason is ALSO forbidden.

"The believers are...those who protect their sexual organs except from their spouse's. . . Therefore, whosoever seeks more beyond that in sexual gratification], then they are the transgressors."(23: 5-6)

"except from their spouse's" mean current spouses. As a result, it is hard to see how "guard themselves" in the way that is discussed and still marry for lustful reasons.

The Prophet (a.s.), our guide and example

It is well known that the Prophet(a.s.) did not marry any of his wives for reasons of lust. There are many proofs for this, however, proof should not be required for a well known fact.

If you would like more evidence I will try to provide it (inshahAllah)

Salam

Muslim narrated the following hadith:

Isnad: Suleiman bin 'abd alRahman and 'Ali bin Hujr » 'Ibsai bin Bunus » Hisham bin 'Urwa » 'Abd Allah bin 'Urwah » 'Urwah

Narrated 'Aisha:

Eleven women sat (at a place) and promised and contracted that they would not conceal anything of the news of their husbands.

The first one said, "My husband is like the meat of a lean weak camel which is kept on the top of a mountain which is neither easy to climb, nor is the meat fat, so that one might put up with the trouble of fetching it."

The second one said, "I shall not relate my husband's news, for I fear that I may not be able to finish his story, for if I describe him, I will mention all his defects and bad traits."

The third one said, "My husband is a tall man; if I describe him (and he hears of that) he will divorce me, and if I keep quiet, he will neither divorce me nor treat me as a wife."

The fourth one said, "My husband is a moderate person like the night of Tihama which is neither hot nor cold. I am neither afraid of him, nor am I discontented with him."

The fifth one said, "My husband, when entering (the house) is a leopard, and when going out, is a lion. He does not ask about whatever is in the house."

The sixth one said, "If my husband eats. he eats too much (leaving the dishes empty), and if he drinks he leaves nothing, and if he sleeps he sleeps alone (away from me) covered in garments and does not stretch his hands here and there so as to know how I fare (get along)."

The seventh one said, "My husband is a wrong-doer or weak and foolish. All the defects are present in him. He may injure your head or your body or may do both."

The eighth one said, "My husband is soft to touch like a rabbit and smells like a Zarnab (a kind of good smelling grass)."

The ninth one said, "My husband is a tall generous man wearing a long strap for carrying his sword. His ashes are abundant and his house is near to the people who would easily consult him."

The tenth one said, "My husband is Malik, and what is Malik? Malik is greater than whatever I say about him. (He is beyond and above all praises which can come to my mind). Most of his camels are kept at home (ready to be slaughtered for the guests) and only a few are taken to the pastures. When the camels hear the sound of the lute (or the tambourine) they realize that they are going to be slaughtered for the guests."

The eleventh one said, "My husband is Abu Zar and what is Abu Zar (i.e., what should I say about him)? He has given me many ornaments and my ears are heavily loaded with them and my arms have become fat (i.e., I have become fat). And he has pleased me, and I have become so happy that I feel proud of myself. He found me with my family who were mere owners of sheep and living in poverty, and brought me to a respected family having horses and camels and threshing and purifying grain . Whatever I say, he does not rebuke or insult me. When I sleep, I sleep till late in the morning, and when I drink water (or milk), I drink my fill. The mother of Abu Zar and what may one say in praise of the mother of Abu Zar? Her saddle bags were always full of provision and her house was spacious. As for the son of Abu Zar, what may one say of the son of Abu Zar? His bed is as narrow as an unsheathed sword and an arm of a kid (of four months) satisfies his hunger. As for the daughter of Abu Zar, she is obedient to her father and to her mother. She has a fat well-built body and that arouses the jealousy of her husband's other wife. As for the (maid) slave girl of Abu Zar, what may one say of the (maid) slavegirl of Abu Zar? She does not uncover our secrets but keeps them, and does not waste our provisions and does not leave the rubbish scattered everywhere in our house." The eleventh lady added, "One day it so happened that Abu Zar went out at the time when the milk was being milked from the animals, and he saw a woman who had two sons like two leopards playing with her two breasts. (On seeing her) he divorced me and married her. Thereafter I married a noble man who used to ride a fast tireless horse and keep a spear in his hand. He gave me many things, and also a pair of every kind of livestock and said, 'Eat (of this), O Um Zar, and give provision to your relatives." She added, "Yet, all those things which my second husband gave me could not fill the smallest utensil of Abu Zar's." 'Aisha then said: Allah's Apostle said to me, "I am to you as Abu Zar was to his wife Um Zar."

My basic issue here is that we must exercise extreme caution when saying something is forbidden in Islam.  You asserted that "If a man is simply wanting to marry a second, third or fourth wife for lustful reasons, then this is prohibited in Islam" and I do not believe your statement is supported by textual evidence.  Certainly, I suppose we can say that as a result of not lowering the gaze, one may became "satanically inspired" but does this mean his subsequent marriage is forbidden? 

Are you saying that the verse you can't put your finger on, condemns lustful, sexual behavior between a man and his second, third or fourth wife?  Because this is the issue, not terminology, and, that you understand the importance of having proof for your assertions.  May Allah, Most High, bless you - your point about asking a scholar is well taken.