You're imagining things.
The whole book is allegorical. It speaks of Christ's bride: The Church.
Yeah, I've read that explanation before, and I'm not buying it. It's an erotic love poem, one of the most beautiful ever written, but a lot of people need to see it as something else simply because they're uncomfortable with anything so frankly sensual being in their bible. Those folks need to stop and think-- God created us as sexual beings. God likes sex-- after all, he invented it. ;)