Lettuce helps you sleep

[Dactyl]

At football today I was standing on the terrace cheering my team onto a glorious 2-0 victory when I overheard someone saying that Lettuce sandwiches help you sleep. There was no explanation apart from "Well you KNOW lettuce helps you sleep but lettuce sandwiches even more so!" This is apparently particularly true when made with white bread"

I'd never heard any of this before. Sounds like rubbish to me.