Ever since they were first caught swapping spit at Soho House, Coulter and Stein’s relationship was one for the ages. As in all great love stories, the two came from different worlds: He was a former City Council president and Democrat, she was the author of, If Democrats Had Any Brains, They’d Be Republicans. Coulter gave Stein complexity. Stein gave Coulter a soul. Their heady two-and-a-half-month courtship kept us all in thrall. Why couldn’t they work it out? “We split because of irreconcilable differences,” Stein told the Post. But really — shouldn’t he have known that going in? Who doesn’t have irreconcilable differences with Ann Coulter?