When I was something like 5 or 6, my family was visiting my grandmother. My sister (who was an early teenager back then) tried to make a prank on me. She told me that she had hidden something, and gave me hints on how to find it (a bit like your stereotypical "colder, colder, warmer, warmer" thing). In the end, I found what it was: My grandmother's dentures in a glass of water, where my grandmother had put them. My sister acted like I should be really grossed out. I wasn't grossed out. I was puzzled. I didn't really understand why I should be grossed out. Ok, my granma's fake teeth in a glass of water. So what? What's supposed to be so special about it? I suppose now I kinda understand why I could have perhaps been grossed out. I'm still not grossed out by dentures. Why should I be? What's so gross about them, even if they are somebody else's? I suppose I kind of understand why somebody else could be grossed out, but I just am not. I hav...