OK - Here it is..... If you open something......then close it! Step 1 - Open Step 2 - Close. Simple, right? I mean isn't this one of the reasons we have opposable thumbs?? You can teach monkeys to close things so it can't be too difficult.
And if you get confused, just try to remember how you opened it.....and then do the reverse!!!!!!
And here is another one. When someone opens up a book, darts their eyes across the page and occasionally flips to a new page............They are reading!! It is not an invitation to talk. And funny, when such a person closes the book (in frustration) the chatter ceases and silence once again reigns.
Until of course the book re-opens and then suddenly the mouths open too!
Arrgh, where is that darn chocolate?