He writes, somewhat lightheartedly, about how the stress of the White House led to his bad tendencies, like smoking, noting that he would sometimes smoke eight or nine or ten cigarettes a day and look for a "discreet location to grab an evening smoke." He said he quit smoking by "ceaselessly" chewing nicotine gum after his daughter Malia "frowned" after "smelling a cigarette on my breath."
Obama explores his marriage to Michelle Obama throughout the book, recalling when they "became friends as well as lovers" and describing her as an "original."
"And yet, despite Michelle's success and popularity, I continued to sense an undercurrent of tension in her, subtle but constant, like the faint thrum of a hidden machine," Obama writes about his marriage. "It was as if, confined as we were within the walls of the White House, all her previous sources of frustration became more concentrated, more vivid, whether it was my round the clock absorption with work, or the way politics exposed our family to scrutiny and attacks, or the tendency of even friends and family members to treat her role as secondary in importance."
Obama adds that there were nights "lying next to Michelle in the dark, I'd think about those days when everything between us felt lighter, when her smile was more constant and our love less encumbered, and my heart would suddenly tighten at the thought that those days might not return."