Quote from : The Spy Who Came In from the Cold Book

Ashe was typical of that strata of mankind which conducts its human relationships according to a principle of challenge and response. Where there was softness, he would advance; where he found resistance, retreat. Having himself no particular opinions or tastes he relied upon whatever conformed with those of his companion. He was as ready to drink tea at Fortnum's as beer at the Prospect of Whitby; he would listen to military music in St. James's Park or jazz in Compton Street cellar; his voice would tremble with sympathy when he spoke of Sharpeville, or with indignation at the growth of Britain's colored population. To Leamas this observably passive role was repellent; it brought out the bully in him, so that he would lead the other gently into a position where he was committed, and then himself withdraw, so that Ashe was constantly scampering back from some cul-de-sac into which Leamas had enticed him.