I see. You know, I like the smell of some things that are supposed to smell bad. The smell of natural gas, for example, is added to make people aware of its presence and be repulsed. To me, though, it meant my gramma was lighting the stove, and was about to make something yummy. Therefore, I find it pleasurable.
Gasoline is also a favorable smell to me. My dad always had to gas up after picking us kids up, as we lived a ways away. That smell meant we were going somewhere nice for a while.