It doesn't matter whether or not you are a multiple; sometimes you meet someone who tells you that they are multiple. How do you deal with them? What problems or issues might you face when dealing with multiplicity that does not share your body with you?
This warrants its own section, as it's entirely different from dealing with the problems within oneself.
Also included here is the basic etiquette for how to deal with multiples. Let's come up with something a little more useful than "Just ask." but of course, yo, d00d, when in doubt -- ASK. *grins*