Split Question

As I'm watching Split, I realized that while I totally support those who have mental illnesses, I'm not sure how difficult it could be to date somebody who was similar to Barry. This isn't a post knocking individuals with a split personality, I'm just sure that dating one with 23 personalities may be a bit stressful. Could you do it? This is a legit question...I'm not saying I couldn't date one with a mental illness I just think that with 23 personalities, you may not know who you're dating at all.