One my my 9-month old’s favorite things to do seems to be to get into a corner, stand up, and poop. He then laughs or giggles. If you didn’t hear him pooping or catch the giggle, you will eventually smell it and the jig is up.
I accidentally took a very scientific study and discovered that 100% of babies surveyed poop in corners while standing by mentioning this story to 2 other parents. This has led me to believe that babies want poop privacy.