"Frodo, me dear, me dear": revisiting Sam/Frodo (and still finding them slashy)

In my re-read of LOTR, I lately began book 6 - the final leg! Here be more musings, this time all about Frodo/Sam as the One True Pairing. Be warned.

I do honestly believe Tolkien didn't intend to make Sam and Frodo's relationship romantic. But I also know from experience that characters start doing their own thing after you've been writing them a while, and I'm sorry, Professor, but those two hobbits REALLY seem like a couple. And they seem like they have been for YEARS before this quest. Or,...