If I leave dishes in the sink overnight or after a long day my roommate washes them. I really should tell him to stop, but hard to tell someone else to stop washing your dishes. FTR, I do wash my own dishes most of the time...
I also don't use a toilet paper holder, no sense in wasting time changing it when i'm perfectly fine without using one.
Another one that doesn't work is "hey can you stop by the grocery store on the way home and grab something for me".