From a certain point of view, the entire human species is caught in one giant web of smut. One person kisses another, who then sleeps with someone else, who then goes horizontal with another person. The more promiscuous you are, the more lines that jut out from your spot on the web. The only problem is, the accuracy of said web is always in question, because not everyone shares the same definition of the term "hook-up".
Now, we obviously can't make that decision for the entire world, as much as we might like to, but I think we can at least come to a fair decision for Mancouch, and perhaps the whole Xanga community.
The true problem with the term is how vague it is. Humans, being the inquisitive creatures that we are, simply aren't satisfied by vague terms, especially when it comes to sex. We want details in every wet, butt-smacking way possible.
Many people take it to mean making-out, nothing more, nothing less. I'd be comfortable keeping the definition here, for two reasons. One, it clears up the meaning completely, as it would cease to mean more than thing. Two, since the term 'hook-up' sounds fairly casual, it would be consistent with the action of making out, which is low-risk and low-consequence.
We all know things get a lot more messy when sex is involved, both literally and figuratively. But when people use 'hook-up' as a way to describe it, it trivializes sex to a point where it seems just as inconsequential as making out. That's a bad thing, even if you're someone who treats sex like shaking hands.
On the other hand, though, saying 'I hooked-up with so-and-so' is a way of being discrete about your sexual misadventures, which I suppose is useful in its own right.
The question is, do we want a catch-all term for all manner of sexual and sexually related activity? It hides the total truth of what happened, but also makes light of things that shouldn't be taken quite so lightly. Do we even want this term to remain a part of our sexual vocabulary?
The simplest option is to not use the term to describe anything at all, but considering how long it has been around, I think we ought to accept that people are going to use it. How would you define hooking up?