system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why are humans attracted to unnatural smells?

Why is it that humans are not attracted to smells that the human body produces like urine or sweat? Every perfume/ cologne is manufactured specifically to mask natural scents and replace them with something completely different. What is it about a cologne or perfume that makes it "smell good" to us?
gpt
The smells of perfumes may be made synthetically, but they resemble the smells of things which people are drawn to. Many of them are made to smell like pleasant-smelling fruit or oils.

People are not attracted to urine and other bodily excrement because since they often contain noxious substances and pathogens, we evolved to develop a feeling of disgust around them. Sweat is interesting because many people are attracted to the sweat of people they are attracted to.