Online survey company Survata has just come out with a new poll of nearly 900 consumers that asked them their interest in upgrading to the iPhone 6. Unsurprisingly, iPhone 5 owners — who likely have two-year contracts expiring this fall — were the most willing to upgrade, as fully 36% of them said they were planning to buy a new iPhone.

However, the one thing that intrigued us most about the survey was that 15% of iPhone 5c owners said they were likely to upgrade even though the year before they’d just spent money to buy the cheaper version of the iPhone. Why are they now willing to pay top dollar for the iPhone 6 when they didn’t want to pay top dollar for the iPhone 5s last year?

Survata put us in touch with a couple of iPhone 5c owners who took the survey and we asked them their reasons for the switch. Their answers show us that consumer behavior is indeed mysterious and that people make decisions for all kinds of reasons that can’t be easily categorized.

Orpheus Richards, an iOS engineer at video-sharing app Ocho, explained that he actually preferred the 5c to the 5s because “it felt smoother, lighter and less fragile than the 5s.” Now he’s paying more to upgrade to the iPhone 6 in part because he’ll need it for his job — since Ocho is a video-sharing app, owning an iPhone 6 will help him learn more about optimizing videos for bigger displays. And as a side benefit he says that “maybe I can get my girlfriend (Samsung user) to quit making fun of my baby screen.”