Okay, so that line doesn't appear on any of the posters for this movie, but it pretty well sums things up. The question is, however, why do they want human women? I'm not telling, but I'll let you in on a couple of things, one of which is that what we have here is another of those '50s movies in which the aliens are taking over the bodies of the locals. After Gloria Talbot marries Tom Tryon, she notices that he's not quite the same guy he was before they married. She eventually finds out that his appearance has been duplicated by one of the aliens who doesn't look at all like him.
Sound familiar? It was a common theme in '50s SF movies, including the better-known Invasion of the Body Snatchers. This movie is almost as good as that one, and if you haven't seen it, it's well worth a look. Tom Tryon starred, and he went on to have a successful career as a writer than as an actor, with novels like Harvest Home and The Other that sold a ton back when they were published. Now I suppose they qualify as forgotten books.