Say I'm in a romantic relationship and I'm trying to decide whether I'd be happier remaining in it, or leaving it to philander. Of course, experimenting with both options isn't an option, since I would lose the initial romantic relationship for good. Also, suppose I really love the person I'm with, and they really love me. Do we have an obligation to each other to stay together, since one person choosing to leave would cause extreme emotional pain to the other? I'm not referring to an ethical obligation since I'm aware that there are different moral theories, but an obligation derived purely from the fact that I love someone. Finally, do I violate either an ethical or other obligation if I cheat on my romantic partner in order to get a comparison?