This might appear to be a bad question to some but i can't figure out the answer.

While reading about an electric circuit, i found this on the web:

[![In this case two metal plates are kept near each other. One of it is positively charges and the other is negatively charged.](https://i.stack.imgur.com/vyjI1.gif)](https://i.stack.imgur.com/vyjI1.gif)

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> Over the course of time, one could think of positive charges moving from the positive plate through the charge pipe (wire) to the negative plate. That is, positive charge would naturally move in the direction of the electric field that had been created by the arrangement of the two oppositely charged plates. As a positive charge leaves the upper plate, the plate would become less positively charged as illustrated in the animation at the right. As a positive charge reaches the negative plate, that plate would become less negatively charged. 
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So my question is that why does only the positive charge flow? Since positive and negative charges attract each other, it seems to me that the negative charge can also move towards positive charge. Am, I wrong at some point?

*If the question is unclear, ask me to edit it in the comment.*