Pheromones have been in use long before they were discovered, and this sentence is not to prove that they exist, because they do. Rather, do you know that sub-conscious attraction through the use of pheromones had been in use since the 19th century?
In Europe during the 19th century, clean handkerchiefs would be worn by men under their arms - you're not reading it wrong, we're talking about armpits - during dancy soiree they'd be attending in order to find the woman they'd marry. The purpose of it is to capture their sweat in the small pieces of cotton one would normally use to wipe off perspiration.
And wiping off perspirations they did with the handkerchiefs, but not themselves.
When a man found himself interested in a woman, he would use that handkerchief that had been tucked under his arms soaking his sweat to wipe off the poor lady's sweat on her face.
Sounds weird, huh? Using a sweat-soaked handkerchief to wipe off a woman's sweat. We thought so too.
Nevertheless, it was how they showed their interest, and how it had been working effectively. It was said that girl would find the scent irresistible, and fall in love with him (madly).
In the same era in Austria, women from the the rural areas would attend dances to find the man they wanted to start a family with. Before attending the dance, they would slice up apples, tuck them in their armpits, and went for a night's fun with the apples under their arms.
After enough exposure to their natural, salty, excretions, they would then feed the men they like with the apples soaked with their sweat. Men who accepted their love would proceed to chew up the slices of apples before swallowing, presumably after sniffing the sweet scent of the women. Hey, women can't smell bad, right?
It was recorded that eating a slice of apple soaked with a woman's sweat was so alluring, a nobleman was very attracted to a woman of a lower status.
Olfactory business is here to stay, baby!