When you're staying at someone's house , you don't get much say in what they do with their space. They're doing you a huge favor, so you don't get to chime in about what they're doing or not doing. You're a guest in their space, and what they say goes. You may not love that Urban Outfitters tapestry they have hanging in their living room, but it's not your living room. You might hate the fact that they only keep one-ply toilet paper in their bathroom, but it's not your bathroom. And you might n…