It's just the sort of thing that happens in my house: my son has a cold in the summer. It's in the 90s here -- it's Texas in July.
Last night I went around the house picking up the trash from each room's bin, and his was overflowing with unwadded tissues. Ick. So I just said: Son, you have to fold in your yucky stuff on the inside of each tissue, and then crumple it up tiny before throwing it in the trash can.
Less than an hour later, his trash can was filled up again. I guess I made no sense.