In the room the women come and go Talking of Michelangelo. And indeed there will be time To wonder, “Do I dare?” and, “Do I dare?” Time to turn back and descend the stair, With a bald spot in the middle of my hair — (They will say: “How his hair is growing thin!”) My morning coat, my collar mounting firmly to the chin, My necktie rich and modest, but asserted by a simple pin — (They will say: “But how his arms and legs are thin!”) Do I dare Disturb the universe? In a minute there is time For decisions and revisions which a minute will reverse.
In the first few lines, Eliot sets a group scene to reveal information about Prufrock, who seems to be at a party and feels insecure. Prufrock is concerned with what others will say about his bald spot and how skinny he is, and so he considers leaving the party before the events could happen. [http://www.poetsforum.com/papers/222_2.html