Not necessarily. Something different is still different. Put whatever term or label you want on it, but it's the meaning that matters.
No, the whole chapter is not about polygamy. There's some very fundamental principles about sealings in general. It doesn't talk about polygamy until verse 34, about half way into the section.
I don't know what we'd do. One fundamental principle is that covenants like that it needs to be sealed by the Holy Spirit of Promise. In other words, it needs consent of the Holy Ghost. If God made it known to us then that's what we'd do.
I think it would be a trial and test of faith for sure, but if we trust God knows the best course of our lives, we would learn what is needed in order to fulfill God's commands - that's the point, bending our will to His, so that we become what He wants us to become. But, if we aren't willing to make that sacrifice, then we'd never get that experience and that knowledge, and we'd be short of perfection. My wife and I find our fulfillment in doing God's will. Like the lesson taught in Job, whatever we're willing to sacrifice (release attachment to) to accomplish God's will, the blessings are restored sevenfold. I would certainly hope my wife would not think the blessing of Eternal Life is worth the sole possession of me. Besides, if we threw the baby out with the bath water, and left Mormonism over this subject, what can we look forward to in your theology. My wife would essentially still be single. So what's the difference to her? She loses me either way.
Read what I wrote to Markk. I don't believe in spiritual procreation. Therefore, supposing I did embrace polygamy in the next life, sex would have nothing to do with my motivation.
I think choosing to believe something to be dirty instead of virtuous, and that the dirty definition must be the absolute meaning is what's ridiculous. You have no grasp on reality. You simply fill in the details to justify a decision you seem to have not made peace with.