|MLA Citation:||Bloomfield, Louis A. "Question 1533: Why do I sometimes shock myself when I kiss Uncle Al?"|
How Everything Works 25 May 2018. 25 May 2018 <http://howeverythingworks.org/print1.php?QNum=1533>.
Most likely, one of you has been in contact with a insulating surface that has exchanged charge with you. For example, if you walked across wool carpeting in rubber-soled shoes, that carpeting has probably transferred some of its electrons to your shoes and your shoes have then spread those electrons out onto you. Rubber binds electrons more tightly than wool and so your shoes tend to steal a few of electrons from wool whenever it gets a chance. If you walk around a bit or scuff your feet, you'll typically end up with quite a large number of stolen electrons on your body. When you then go and kiss Uncle Al, about half of those electrons spread suddenly onto him and that current flow is shocking!