Yes, in that chapter, it's saying that you're sinning by doing that: joining yourself to a harlot, it's fornication. She is a WHORE. You don't marry a whore.

And deeper than that, marriage being a picture of Christ's covenent with us to save us despite how much we personally suck, is drawing the natural conclusion that being a whore is abominable, so don't act like a harlot would - and love God instead of going after things that aren't God.

That is telling you that because saved believers are joined with the Lord as one spirit: DON'T BE A SPIRITUAL WHORE. YOU WOULDN'T MARRY A PHYSICAL ONE.