https://www.siliconvalley.com/2021/10/01/pumpkin-spice-really-does-give-you-the-warm-fuzzies-heres-the-science-of-why/

If you’re suddenly craving pumpkin spice lattes or pumpkin bread now that it’s officially fall, it’s not just your stomach talking. Catching a whiff of a pumpkin spice-flavored food or drink can trigger emotions and memories that go deeper than a hunger pang.

Combined with savvy marketing, it’s no wonder the phrase “pumpkin spice” has become synonymous with the onset of fall.