Hand job given to another person under a table or desk.
Since flags are supposed to be hauled down during rain a flagpole under a protective cover would protect a flag from the rain. Since a flagpole could be an analogy for a penis a penis under a table/desk could be likened to a flagpole protected from the rain - 'rainy flagpole'.
A male sex partner punches his female partnerin the face resulting in her to cry. He then rubs his penis on her face in hopes to apply the moisture from the tears to the outside of his penis to use as anal lubrication. He then inserts his penis in her rectum.