US President Barack Obama conquered a long-term smoking habit because he was afraid of his wife, First Lady Michelle Obama, he sad jokingly to a UN official.
The funny admission, which the president made apparently unaware he was on camera, came at the UN General Assembly in New York on Monday.
Mr Obama while talking privately to a human rights campaigner said that he had not had a cigarette in roughly six years.
"That's because I'm scared of my wife," he said with a smile.
The conversation between Mr Obama and Maina Kiai, the UN special rapporteur on the rights to freedom of peaceful assembly and of association, occurred near an open microphone and was later broadcast by CNN.
"I hope you've quit smoking," Mr Obama said to Mr Kiai, a Kenyan.
"Sometimes," Mr Kiai responded, as the two smiled and shook hands.
Both Mr Obama and Mr Kiai attended Harvard University Law School.
Mr Obama has publicly acknowledged his struggles to quit smoking in the past. In 2011, Mrs Obama said her husband had finally overcome the habit.