I think the biggest reason for multi dating is perspective. When you are dating one partner your judgment seems to more clouded as opposed to when you are seeing several people and are blessed with the chance to remain objective by reason of the gift of comparison. You also see members of the opposite sex for who they really are instead of idealizing them and ignoring their faults.
Another pro of multi dating is the higher chance for success as dating just one partner is an all-or- nothing situation. Dating many people increases your chances of one of them working out. If you were applying to college, you wouldn’t apply to just one would you? You would send application letters to many in order to increase your chances of being admitted to at least one, which you hope turns out to be the best choice for you. See? Same difference
Multi dating spares your feelings as you do not attach yourself to one person in an overly deep manner. If your relationship with one partner begins to turn grim, you have the others to fall back on. Not to mention that multi dating keeps you constructively busy by giving the much needed added color to your social life. You do not want your social life to be defined by just one person do you?
On the other hand, multi dating has its cons;
Multi dating is a choice that should not be made if you are looking for a serious relationship. Take it from the attitude that you are basically looking to have some fun and build your ego. Multi dating ends technically when one of your partners becomes your exclusive boyfriend or girlfriend. In other words, it is a fun selection process.
What do you think? Is multi dating a good idea after all?