Imagine a world in which fall came and went, and the only thing we ate that was pumpkin spiced was actual pumpkin pie . That was a world we all lived in just 14 years ago.

Today, you can find foods ranging from Cheerios to vodka that come in the ubiquitous seasonal flavor. Some of them contain actual pumpkin, some of them contain actual spice, but if were being honest none of them actually taste like the pumpkin pie experience theyre trying to replicate.

How did we get to this place where Americans spend close to $500 million on pumpkin-flavored products every year?

It all started in 2003, when Starbucks released its first ever pumpkin spice latte.

According to Business Insider , the PSL (ahem, pumpkin spice latte) almost never came into existence. During a tasting of new seasonal options, its flavor did not stand out as much as other beverages like chocolate caramel and cinnamon spice. But Peter Dukes, a Starbucks brand manager, fought for it. And after much recipe testing and tweaking, the latte made it on the menu for a limited time offer.

It was an instant hit.

Since then, it has had a life of its own.

The PSL which acquired its nickname because of what baristas wrote on the cup even has its own Twitter account with 115,000 followers . And people hashtag #PSL on average 3,000 per day , according to Starbucks. Forbes estimates that the company has made $100 million from PSLs in just one fall . Thats a lofty sum, but considering the fact that over 200 million PSLs have sold since its inception, it makes sense.

Starbucks is not the only chain to sell the PSL these days. Mcdonalds, Dunkin Donuts and other coffee chains have all followed suit. This drink, which is often released around Labor Day, now feels like the true marker of fall, even more so than the actual first day of fall, which happens a few weeks later on September 22 .

The seasonal food that wasnt.

The strange thing about the Starbucks PSL is for over a most of its existence it didnt contain any real pumpkin (real pumpkin was added in 2015 ). So even though folks were excited about enjoying a seasonal food, it didnt actually contain any seasonal ingredients in it.

Given that it ran over a decade without pumpkin to me, this is a marring of the true spirit of eating seasonally, Sophie Egan, author of Devoured , told HuffPost.

It all has to do with the LTO.

LTO stands for limited time offer, and thats at the crux of what makes these seasonal products so successful. Thats what makes this drink that doesnt actually taste like pumpkin pie so desirable.

That, and peoples increasing FOMO (fear of missing out). If you dont get a PSL, then fall has passed you by, explained Egan on the workings behind the LTO of the PSL. People are terrified of missing out of a quintessential fall experience.

The PSL is now part of the broader pumpkin spice everything craze, says Egan. And part of the reason it works so well, Egan elaborates, is because in general pumpkin has a health halo. Its a vegetable (in the culinary sense), so if you add it to desserts, then clearly its healthier.

Even though, of course, its not .