The odd thing is that there are people who are fairly consistent in their use of apostrophes- and get each of them wrong. I have a sister in law who somehow internalized it backward- she'll write about there new house and the two dog's that both love the back yard, and that she and her daughter both have cold's and then tell me about how they are painting their new house and the houses color will be blue.

After 45 years, I have decided she ain't gonna change. I just don't understand how she has never noticed the rules.