OCD IS A DISORDER that tends to run in families. However, as often as not, family members will have different kinds of OCD from one another. Mom may hoard, Dad may worry obsessively about health and germs, and Billy may have organizational and hyper-responsibility behaviors. Or Billy may be only mildly affected; indeed, he may be completely unaffected, in much the same way that he may have blue eyes, although Mom's and Dad's are brown. As important as it is to know how OCD affects kids, it's equally important to know how it affects older persons. This chapter includes all you need to know.