You'll know I've showed your house if you find a fingernail somewhere on the property. Broadway Real Life nails, to be exact, the kind you glue on with the little tube of super glue that will stick your hand to your desk if you're not careful. The first time I lost a nail in the line of duty I was attempting to unlock the hook-and-eye on the bathroom door of a cute little Victorian. The agent called me afterward for feedback and then said: "Oh, by the way, I think someone had lost a fingernail at the house. I found it in the downstairs powder room."
"That was mine," I admitted, sheepishly. "You can go ahead and throw it away." (As if she would consider saving it?)
I've lost nails prying open stuck kitchen cabinets and lifting up the corner of carpet to see if there is hardwood underneath. And there's nothing worse than popping off your nails while struggling with one of those old-school lock boxes, the kind even Houdini wouldn't have been able to open. Wearing fake nails in real estate is like wearing high heels. (I do that too). Looks nice, utterly impractical.