When my husband's grandmother was still alive, we would occasionally drive up north to Redding, CA to see her for the weekend. She was getting older, and had some health problems, so we tried to see her as often as possible. She lived in a little double wide mobile home.
Now I have to tell you that my husband has never been very squeamish about germs. He can eat after his children, and drink from the same cup as them. That's probably why I wasn't so worried about giving him the "dog-chewed" meatloaf. I often joke with him that he reminds me of George Castanza from the tv show "Seinfeld". There was one episode where George was cleaning and saw a Hostess cupcake sitting in the trash. He debated about whether or not it had germs on it, but ultimately ended up snagging it out of the trash and eating it. I have often accused my husband of having that same mentality.
One night, when we were visiting his grandmother, my husband got up in the middle of the night to use the restroom. He was a little thirsty, and saw a cup sitting on the side of the bathroom counter. He picked it up, rinsed it out a little and got a drink of water from it.
The next morning we woke up lazily, were all getting ready for the day. His grandmother came out of the restroom, and I'm not sure why she felt she needed to share this with us, but she said, "I always have to measure my urine.".
To this day, my kids have never let my husband live down the fact that he drank from her "pee cup". :)