1.   He flung himself at her, springing the top button of his jeans and jerking them down as he did so.

2.   He had loosened his tie and undone the top button of his shirt.

3.   He hesitated, then with a straight arm reached and undid her top button.

4.   He undid the top buttons of his shirt and pulled the shirt apart.

5.   He unfastened the top button of his shirt.

6.   He was wearing a white shirt with the top button undone.

7.   Piers was in the living-room as they walked in, half naked, the top button of his faded jeans undone.

8.   The top button popped off my shirt.

9.   He rarely buttons the top button on his shirt.