A Polyamorous Ketubah?

I was talking to a friend about my polyamory post (next time, girl, can't you comment here!), and she asked a great question:

What would a polyamorous ketubah look like?

Obviously "k'dat Moshe v'Yisrael" would have to be modified but would the ketubah simply allow for further ketubot? Or perhaps it would have space to add more partners along the way.

What do you think? How could a ketubah be worded to support open relationships?

Getting my language geek on

So...you should all know, I'm a complete language and grammar geek. Hebrew...English...doesn't matter. I love it.

So, I was recently pondering...if BDSM were a Hebrew shoresh (Bet, Dalet, Samech, Mem), and then made into a verb, would it be piel or hitpael?

Since those are the 2 binyanim that can have a 4 letter root, they're the options.

I mean...l'badsem sounds nice....and it is, in some ways, active. I like the idea of it being an active verb for anyone taking part. But l'hitbadsem I prefer...reflexive seems to work better, ideologically...

On the other hand, Bidsum sounds better than hitbadsum as a gerund.

Thoughts?