One of my more bizarre fetish motivated experiences was travelling to another state to spend a weekend with a couple whom I had never met in person, only over the 'net. The wife ("Nikki") had a little amateur site and the husband loved watching her getting with other men.I thought she was very hot and of course she was a smoker. As it turned out, she was also a leather girl too, with a great leather wardrobe, so she was right up my alley.
It was a wonderful weekend, but only one point is relevant here. They had twin girls about 3 years old at the time. We had to drop them off at the babysitter, so we're in their car, husband driving, me in front, and Nikki in the back seat with the girls. It was cold and the windows were up. A couple of minutes into the drive, Nikki says, "I've got to break the rules. I need a cigarette." So she lights up while sitting back with the girls, windows up, smoke swirling all around. One of the many reasons I had an erection all weekend.