If we are to make a "assumption" that God wants us to be married to one wife based on this text (for it says this nowhere in the actual text), are we then also to assume that we are to be naked as in the text? Are we to assume that we are to marry all available women (as Adam did) as in the text?
Matthew 19
4Haven't you read, he replied, that at the beginning the Creator made them male and female,[
a] 5and said,
For this reason a man will leave his father and mother and be united to his wife, and the two will become one flesh [
b]? 6So they are no longer two, but one. Therefore what God has joined together, let man not separate.
Jesus refers to this text when dealing with marriage which is why I quoted it. As for being naked this ended when God clothed Adam and Eve and made coverings for them showing that he no longer wanted them to be naked, however monogamous marriage was never ended by god in this way as was nudity.
Genesis 3
21 The LORD God made garments of skin for Adam and his wife and clothed them.
Note also that Jesus changes the text from they shall become one flesh to these TWO shall become one flesh so now it is clear that marriage must be between two people. No you cannot assume you should marry all available women, this is plain absurd and is not part of the example as there is only one woman available(not many) and so you cannot use Adam marrying one woman to justify someone else marrying all available women as the analogy is not present. This is like saying that if my mum allows me to have the last piece of cake on one ocassion (so i eat all the available pieces of cake) then the next time she when she has a cake she will divide it in the same way meaning that she will allow me to have all the available pieces of cake (ie the whole cake), when really she will only allow me to have one piece as before, the analogy can only be used to allow me to have one piece of cake.
So everybody should model their lives after Adam and Eve, and do exactly as they did?

No that is not what i said, i mean that everyones MARRIAGE (and only marriage) should be modelled on that of Adam and Eve not everyting else because in the bible Adam and Eve are used as a model for marriage.(see verse above and others below)
Matthew 19
4Haven't you read, he replied, that at the beginning the Creator made them male and female,[
a] 5and said,
For this reason a man will leave his father and mother and be united to his wife, and the two will become one flesh [
b]? 6So they are no longer two, but one. Therefore what God has joined together, let man not separate.
Mark 10
5It was because your hearts were hard that Moses wrote you this law, Jesus replied. 6But at the beginning of creation God made them male and female.[
a] 7
For this reason a man will leave his father and mother and be united to his wife,[b] 8and the two will become one flesh.(this is a reference to Gen2:24 where the marriage of Adam and eve is described)[c] So they are no longer two, but one. 9Therefore what God has joined together, let man not separate.
Yet again marriage occurrs when TWO become one flesh not three or four or five as with polygamy but it makes it clear that marriage is supposed to be between two people.
1 Corinthians 6
16Do you not know that he who unites himself with a prostitute is one with her in body? For it is said,
The two will become one flesh.[
b]
(another refernce to Gen2:24 which describes the marriage of Adam and Eve) 17But he who unites himself with the Lord is one with him in spirit.
Yet again marriage occurrs when TWO become one flesh not three or four or five as with polygamy but it makes it clear that marriage is supposed to be between two people.
Ephesians 5
22Wives, submit to your husbands as to the Lord. 23For the husband is the head of the wife as Christ is the head of the church, his body, of which he is the Savior. 24Now as the church submits to Christ, so also wives should submit to their husbands in everything. 25Husbands, love your wives, just as Christ loved the church and gave himself up for her 26to make her holy, cleansing[
b] her by the washing with water through the word, 27and to present her to himself as a radiant church, without stain or wrinkle or any other blemish, but holy and blameless. 28In this same way, husbands ought to love their wives as their own bodies. He who loves his wife loves himself. 29After all, no one ever hated his own body, but he feeds and cares for it, just as Christ does the church 30for we are members of his body. 31
For this reason a man will leave his father and mother and be united to his wife, and the two will become one flesh.(another refernce to Gen2:24 which describes the marriage of Adam and Eve where the word they is replaced by two) [
c] 32This is a profound mysterybut I am talking about Christ and the church. 33However, each one of you also must love his wife as he loves himself, and the wife must respect her husband.
When you study the bible it is clear that Adam and Eve are the examples of marriage that God wants us to follow as it is always referred to when dealing with marriage.
Maybe that's why God made gay people: population control.
:o
God didn't make Gay people he made two heterosexual monogamous people(Adam and eve) and it wasn't until after the fall and the entrance of sin that homosexuality existed, there is also no concrete evidence to prove that people are born gay and cannot change but that is another issue for another thread.