The song tells, in a few cryptic verses, of a brief and ambiguous encounter — a night spent at a woman’s flat, a morning waking alone — its meaning left half-hidden, ending with the wry image of the title.

The Charles River Valley Boys recorded a bluegrass version for their 1966 album “Beatle Country,” a set of Beatles songs reworked in bluegrass style; Paul McCartney himself wrote to the label in appreciation.