system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:How does a sweet scent (such as in soaps or perfumes) smell, but not taste sweet?
gpt
Naturally occurring sweet items such as fruits and berries, have a semi sweet smell to them to help lure animals towards them, consume them, and then proceed to spread their seeds and make new plants. Part of what makes them enjoyable is the taste. This association of sweet smell = sweet taste from an evolutionary standpoint helps to ensure the survival of the species. 

In things such as soaps and perfumes, that may or may not contain the same chemicals/plant based ingredients, there are other chemicals that have tastes that far outweigh that of the 'sweet scent' on your tongue. Usually these are chemicals meant to make the smells and product last a long time. 

In products that don't contain the plant/sweet item derivative, they chemically reproduce something that is close to the original to pass it off as the same or similar smell. These chemical reproductions of scents generally won't taste good unless taste is also a factor considered in the development process.