The information below is what I have gathered from any available and applicable Alice series media. I tried to stick strictly to the information specific to their dating habits but a few traits cross over into other areas, and some traits that are a consistent part of their nature are not mentioned here. Since the characters don’t often mention why they act in certain ways, I can’t help but base this off of how I interpret the Jokers’ behavior. Though I can assure you that I base everything I believe about them off of a thorough study of everything related to the character.
I’m going to put this under a ‘read more’ so I can add things if I find it necessary. People are welcome to mention anything I might have missed so I can add it. Also feel free to ask me questions if you are looking for something specific that isn’t here. As long as there is an answer in the Alice series, I can probably answer it (and add it to the list).