I've wondered about don't let your deal go down, come to think of it. Maybe that Gambler could have explained it but he died before becoming really helpful. I never seriously considered building my nest at the top of a tree either and thyme -- it does grow back.

What about "never place your affections on a green willow tree" Not only have I never thought of doing that but I've never seen a willow in any other color - unless it's dead and you wouldn't be likely to love a dead willow. Of course here willows are terrible weeds so come to think of it dead ones are quite appealing.