I'm just the opposite, Geoff. Kids out the wazoo of all ages (BIG family) plus my phone works with me. My pockets are regularly full of sawdust, dirt, concrete, you name it.
I didn't buy the iphone because it was sleek, not at all. I bought it for it's functionality.
I have a carpenter's calculator on there, keep all my drawings and prints on it, you name it. It gets filthy regularly and I have to clean it often.
It's held up to anything I throw at it, up to and including dropping it dozens of times and stabbing it with a razor knife (by mistake, obviously).
You and I are representative of both ends of the spectrum.