i dont like to use my phone while I’m walking in case it falls precisely between the grates of a drain
There's a clip of this going 'round lately - cute girl on a pier posing for pics, she twists a bit while sitting and her phone slides out of her pocket and through the gap in the pier's boards, probably right into the ocean.
(This sort of thing is why I built a belt holster for the phone and don't trust it to my pockets. I'm an IT Guy, it's ok if I look like a geek.)