
The Mermaid
Poem by William Butler Yeats
A mermaid found a swimming lad,
Picked him for her own,
Pressed her body to his body,
Laughed; and plunging down
Forgot in cruel happiness
That even lovers drown.
According to Wikipedia Philtrum (Greek philtron, from philein, "to love; to kiss") is the vertical groove in the upper lip, formed where the nasomedial and maxillary processes meet during embryonic development. It exists to allow a dynamic range of lip motions necessary for human vocal and non-verbal communication.