This really happened

Abby: I'm really disappointed that my nightlight still has poop on it.
Me: There's poop on your nightlight?
Abby: That was REALLY naughty of me to get poop on there.
Me: How did you get poop on there?
Abby: I was trying to poop behind my light.
Me: What does that mean?
Abby: I'm not sure.

How did she get poop on her nightlight? When did this happen?  Did it fall in her potty or did she use it to wipe?  Did she have poop on her hand that she wiped on the light?  Did she do it last month and just remembered today?  Kids are gross!