That's where it gets strange, and where the documentary didn't dare go. Read the wikipedia page it gives a break down of their organs and what they share, how many of each. They have 2 spines & brains, one vagina. They're a little young dude, but yeah I did wonder if they would both get off during sex, or how the hell they would even negotiate that one if one of them liked a guy the other didn't or something. Definitely a lot of taboo questions you wish people would have the balls to ask them.