This story he told me I will propose as a challenge to this forum.
2 garbage men, who had been in the buisness for 2 decades, who had sufferd foul odeurs through out their career, took on a vacation to Turkey and went to the perfume streets.
As they walked the one would become ill, and in the end fell to the ground. The helpful perfume sellers would aid the poor man with their smelling salts, but only making him go to a deeper coma.
The other garbage man would realize it was the thick odour in the street that caused the problem, and pulled his friend out to cleaner air, which helped and he would awaken from the coma.
Conclusion: each their scent.