Emotional... it is easy to move on if you physically cheat on someone...after the action is over with the person can move on, however, if the person cheats emotionally, it is not only harder to move on, but that person is connected to that person way beyond easily being repaired. Emotional cheating means that those two people are joined by spirits and not just bodies, so technically that other person has more of the person that is not easily shared. The other person owns part of the other soul. I can deal with a limited amount of physical cheating (but even that can be fixed by me becoming the other woman). However, if that person is emotionally cheating and isn't physically cheating, I would be more devastated: that person has given someone else what is supposed to belong to only and meant only for me. Granted the same can be argued for physical but emotional cannot not be fixed. Once you love someone, rarely can you change that. You might hate them, but you will still on some level, love that person. And you will still feel for them. A physical connection is no danger or no threat: when it is all said and done, he's coming home to me. But when he connects to someone emotionally there is a threat: he can and will leave if that connection becomes more serious than just a love of being friends.
Me....just my opinions....you don't have to agree with them.