If you're left-handed, you know the world is designed for your right-handed peers. Sure, every once in a while a designer will throw you a bone, whether it's a left-handed toothbrush, scissors or a butter knife. But those bones have been all too infrequent.
So, for lefties, smartphones have been a pleasant refuge where the playing field is evened out. Your smartphone apps are splayed out in such a way that they're as easily accessed from your left thumb as your right thumb.
Except smartphones also sometimes let left-handed people down. Case in point, Apple's new iPhone 6s and 6s Plus with Apple's new iOS 9 operating system. They've got some left-handed Apple users fuming.
A few of the smartphones' features are definitely better suited to right-handed people than lefties. Among the most-complained about functions is closing apps, which now requires a right swipe, where iOS 8 used an upward swipe.
When you use your iPhone 6s and 6s Plus in landscape mode, the iPhone's dock, with your apps, shifts over to the right side of the screen. If you're holding the 6s or 6s Plus with your left hand, opening one of those requires your right hand. That's made all the harder by iPhone's large size, like the 6s Plus' 5.5-inch display.
Of course, there are left-handed complaints about all iPhones, like the "x" button you touch to close an app. It's almost always on the upper right-hand corner.
As is so often the case with protesters these days, left-handed iPhone 6s and 6s Plus users are taking their beefs to social media. Their disappointment with Apple has been swift, and relentless.
One user wrote on Twitter: "As a left handed iPhone user, I feel discriminated against by all the features situated on the right of the screen for one handed use."
Another wrote: "I just realized iPhone's side dock is useless on landscape mode if you are left-handed; and I am."