Not quite related but both of my geckos have potty trained themselves. They each have an empty tissue box in their tanks as hides but for the past month or so they have been nearly exclusively been using the boxes as toilets! It's very rare to find a doodle outside of the box now.

I actually panicked a bit last time I went to spot clean their tanks and couldn't find any poops! I picked up the boxes to switch them with new ones and was surprised by the amount of rattling. Fulla little dried up poopers!