We all have one couple in our lives just like this. You know the ones who are constantly on again then off again all in the space of a few days? They're most likely a Pisces and Capricorn. While they do have plenty in common, these two are just one of those matches that will never work out. We do have to admire them for trying so many times, though! It's more than we can say for the rest of this list.
The clashes are obvious when you take a look at the characteristics of both signs. Pisces hates being tied down and fears commitment. Seriously, this is a sign that can barely commit to a decision about their next meal, so you can only imagine how they get when it's time to commit to a relationship.