It is somewhat ineffecient spacewise. But my area tends to have fruit fly problems during the summer, so we use the smaller plastic bags to more tightly seal food waste to keep fruit flies from getting to it. Also reduces odors from the trash

Same here. I started doing it as a silly thing to tease/bug my girlfriend but now it’s become a permanent part of my personality. I will now only say “jadies and lentlemen”, and I did it so frequently that she says it too.