My husband had a normal sense of smell but he could NOT smell gas. For several mornings before he went to work he used his desk in the basement to work on income tax. One morning, I opened the basement door and yelled at him to get out of there because I could smell gas. He insisted that I was imagining it.
But he finally got out. The man from the gas company told me that if he had lit one of the cigarettes sitting on his desk, he would have been dead, and the house destroyed.
Glad to hear that there was good outcome. I'll bet he's been more attentive since that episode.