A man sits while someone combs his hair, and by the end of three short lines he has stopped being a man at all. That is the quiet joke and the quiet tenderness of "Groom". The speaker is "combed by my girl", and from her point of view, he suggests, he is "an ape". The hair falling under the comb becomes something else again: "I rain down wool." The central idea is that being cared for strips away dignity, and that this is no loss. To be tended by someone who loves you is to be returned to something animal, comfortable and a little ridiculous.
The title does a lot of the work. "Groom" is a verb before it is anything else, and it is the word we use for what primates do to each other, picking through fur in a ritual of trust and affection. Once the poem calls the speaker an ape, the title tells us this is no insult. In ape society, being groomed means being accepted. Anyone who also hears "groom" as in bridegroom, or as in the person who looks after horses, is picking up real echoes of the word. Those meanings are my inference, since the poem never confirms them, but they fit its themes of intimacy and tending.
The poem withholds who "my girl" is. She could be a partner, or she could be a daughter combing her father's head, and the poem works under either reading. The phrase "to whom I am an ape" has the teasing quality of a child's game, and it also suits an affectionate lover. The stiff grammar of "to whom" sits comically beside the blunt word "ape". The speaker talks like a formal grammarian while being treated like a zoo animal, and he seems to enjoy the contrast.
The form is as bare as the content. There is no rhyme, no punctuation, and no capital letter except the pronoun "I". Every one of the fifteen words is a single syllable: head, combed, by, my, girl. The poem moves like comb strokes, each beat even and unhurried. The lines run five, six and four syllables, close to the haiku's compactness without following its 5-7-5 count. The shortest line comes last, so the poem seems to drop away beneath us, like the hair itself.
Without rhyme, the sound still binds the poem together. "Girl" and "wool" both end on a soft, liquid *l*, so the first and last lines frame the poem. The long *a* of "ape" returns in "rain", linking the speaker's new animal identity to the falling that follows. The *m* in "combed" and "whom" hums through the opening lines like a contented noise.
The grammar tells a small story too. The first line has no "I" at all. "Head combed" is a passive fragment, and the speaker is reduced to an object being handled. In the second line "I" appears, but only as the thing someone else sees: "I am an ape." Only in the third line does the speaker become the subject of an active verb, "I rain down wool". He is passive and perceived, and then, in the last moment, he gives something back.
That last image is the best of the three. Apes have hair, not wool, so the word brings in a different animal, the sheep. It is gentler, more domestic and more useful. The speaker slides from wild primate to docile flock animal without any fuss, and the comb becomes a kind of shears. "Rain" then turns the shedding into weather. Loose hair falls like a soft shower from a head that has become a cloud. The verb makes the moment feel generous, as though the speaker were offering warmth, since wool is what we make blankets from. A small, slightly embarrassing bodily event becomes a gift.
The poem is significant for how much it gets out of so little. In fifteen words it manages comedy, affection and a quick change of species. It also suggests that we can be most ourselves when someone else sees us as something less than human. The speaker does not protest being called an ape. He answers with a joke of his own and lets the wool fall. The poem ends on its softest word, and the reader is left, like the speaker, sitting still and being looked after.