hehe. Pinky and Brain. I love it. What are we going to do tonight?!?
These guys look fine to me, but I would recommend a water change as their gills are curling some. If you are concerned about irritation then the first thing I would do is test the water and the second thing I would do is change it, even if the parameters are fine. Keep an eye on the parameters when they are showing signs of irritation and when they aren't and that should give you an idea of how they like their water.
Do you have a liquid test kit? (API Freshwater Master is the one I use)
What are the parameters right now? What are they about an hour after a water change?
I keep a notebook where I write down all my test results so I can see trending if it is happening. It's something you could do if you think it might help.