An optimal timing problem from The Daily Trail:
... if Ol’ Wally Wood is growing hardwoods, he might get a cutting in once or maybe twice in a lifetime… Unless he inherited a stand of mature oak, and is replacing as he goes with sound forest management practices, Susan may be waiting for a long time to get a ring on her finger…
In order to gain insights into her loveless future, Susan should be comparing the growth rate of the stand of trees against interest rates. And with such low interest rates she should realize that Wally Wood will never pop the question!