I have two Kissing gouramis. They are so much fun to watch. The kiss the sides of the tank because they are mirrored and they think it is another fish. Lately one of my kissers has been lying up against the tank in a certain spot, and then she (I'm not sure if it's a girl, I just call it that) will take off and swim. 10 minutes later she is in that spot again. The other kisser doesn't do this. Anyone have any idea why she does this?