It can be argued that who messages first in a relationship does matter, as it can set the tone for the communication between the two individuals involved. If one person always messages first, it may give off the impression that they are more interested or invested in the relationship than the other person. Additionally, if one person is constantly messaging first and initiates most of the conversations, it could create an imbalance in the relationship where one person feels like they are doing all of the work. However, there are also arguments to be made that who messages first does not matter as much as some people think. Ultimately, it is up to each individual couple to communicate and figure out what works best for them.