Thanks, I've never seen the show, link explains the situation well.
To those who watch this show, do the couples ever have normal, successful marriages? Probably not, would be too boring and result in low ratings.
Of course all of the couples have problems. Most are cultural differences. One couple is in the process of divorce. The woman is much older than the husband. In this case the woman is more than a little strange. Another couple is separated and headed for divorce also.