More Cory thoughts

My panda corys (Corydoras panda) have always been my most active corys - at night they tend to swim up and down the glass or plants. While I have always noticed that they swam "two and one" (two that stick close together, while the third tends to be on its own more), but it never crossed my mind until recently that the two that swam together might be a male and female. But that's what I think it is. Tonight I notice similar behaviour from the two "elegans-type" corys. If only I had some place to let them try spawing...