Shame, if you actually wanted to participate the natives would probably agree. You might even be chosen as one of those whose sex changes: your possibilities are male, female, other, none, all, and some. I can't explain it any more than that, but if you are invited to participate and you are selected as a "changeling" a refusal would be considered unfriendly and you'd "softly and silently vanish away." These folks are open and above-board about it, but they are still dead serious about reproduction.