Imagery is used quite often in the Bible to make a point. A lot of what Christ said to His followers were in the form of parables. So it shouldn’t surprise us to find an analogy in the Proverbs that compares people to things.
Each person in the marriage relationship brings something different. They bring their perspective, their ideas and dreams, their opinions and their desires. They are two different beings made one through their vows and in the presence of God.
We know that we live in a sex drenched culture. One that teaches young women to use their bodies to get what they want on one side, while proclaiming that they don’t get enough power with the other.