I'm walking into the kitchen and stub my toe on the box that you carelessly left in the kitchen. I get pretty mad and open it to find your sleeping bag. I then get the perfect revenge idea to teach you to clean up your things. 

I pull down my panties and hump the soft sleeping bag and rip a couple big loud farts onto it. then shit and wipe many times from many angles making sure I get turds and smears on every surface possible. 

I even hump and bounce one of the turds with my ass to spread it around more and take small controlled peeing to other sections >:D 

Finally I wrap it in a bag and put the smelly mess back into the box to rot so you have to find it later!