They don't bathe very often or use deodorant. Imagine the stink an open fire stirs up, especially without clothes to block/catch some of the "stank".
So you might be a little insensitive to filthy people.......yes..??
Old girl friend, who lived in Paris, for a time, told me her Froggie boyfriend would stand in the shower, but not use soap. She told him use soap, or no loving. He lathered up.