My friend and I were talking the other evening about men and what they actually want. I was saying that men are more likely to commit to a woman with class, integrity and intelligence.

A guy commits to a woman that has a good rapport with him.  It certainly doesn't matter what class she is from, rich men can marry women from poor classes.  Integrity does count because if she's a prostitute or has slept around a lot, most men probably wouldn't want anything to do with that sort of women.  And it doesn't really matter whether she is thick or intelligent as long as a man gets along with her and has a good rapport, it's not really an issue.  It's true that maybe certain guys might see intelligence as important but the average guy I don't think is that bothered.

My friend thinks that a man will commit to a woman that he fancies a lot and fulfills all his sexual needs.

Good looks is important, but again rapport I believe is more important.  It's true that if a woman is ugly then he maybe less likely to get to know her and less likely to want a long term relationship.  But again even some unattractive women can convince men based on personality and rapport alone (for example the comedienne Jo Brand is married and had boyfriends before that).  Sex is important to men, but I think it's a case of all women have the potential to fulfill his sexual needs.  As long as the woman is open-minded and willing to experiment, I don't see fulfilling sexual needs as the ultimate point in getting a guy to commit.  Sorry to be blunt, but a bloke could go and see a prostitute or even have casual sex, it's cheaper and less hassle, so sexual needs is not the ultimate thing that rules a man committing to a relationship.  If a guy is only interested in sex, he won't be that fussed about her looks or personality as long as he gets some.

Their mind and behaviour have little to do with it.

Some men are different and some men do have different minds, some men are more alpha male and some have a feminine emotional side and both those type of men have different tastes in women.  But I always talk about most men and what the majority think.  I think it is true to say that very few men conciously know what they want from a woman, when they do find the right woman it's because they instinctively know and it's the right time in their life to settle down.

I don't agree with this in the long term. I think that a man might have a relationship with a woman like this but if theres those other bits missing (class, integrity and intelligence) he won't want to marry or live with that person in the future. Whose right?

I think neither of you are right.  A man commits to a woman he has rapport with.  Unconciously a man goes for a woman that will look after him, look after his kids, produce healthy offspring and deep down she must be caring.  As far as sex goes a woman should be fairly flexible but really a guy usually dominates in bed and gets what he wants from the woman, whatever woman he is having sex with.  It's a woman's personality and timing that really dictates whether a man commits to a relationship.  Looks is only really important in the early stages in getting him to decide whether she is worth a try and whether he wouldn't be embarrassed seen out with her.

That's all my opinion, of course I could be wrong.