Eh, it ain't that old. :-)

I too much prefer fics that allow Ten and Donna to be "just" friends. Friendship between two major opposite-sex characters with no expectation of "more" is a rare and precious thing in fiction. (Seriously, don't get me started on the prevailing attitude that platonic friendship is inferior to romance/sex, or a mere lead-up to it.)

But this story is pretty close to how I picture Ten and Donna having sex, if they ever were to actually do so.