i love me some Romaine Lettuce!
Romaine or cos lettuce is the worst food in the world. 
oh yea? why is that?
Tasteless, watery and gross. I'm not a rabbit. It apparently reached the West via Rome and they should have not brought it over.
how did it get so popular ?
I'm guessing because it's easy to grown and very widely available year-round, nothing to do with taste.
ah i  get it now.. well you have convinced me! i hate it as well.
 The thick ribs, especially on the older outer leaves have a milky fluid on them that make me want to stop eating vegetables.