Well, if you come from a family that does not allow you to feel (as a lot of us do) then yeah it is a foreign concept. When you're not allowed to be angry, or you get punished for being scared or sad, you hide everything for safety. when you're finally allowed to feel again, many of us don't know how any more. Some never regain it - they married into abusive relationships or there are many other reasons. Many ppl like myself stay numb or make themselves numb so they don't have to feel because at this point, not only are feelings foreign, but they are firghtening and cause a lot of emotional pain until one relearns how to feel, and how to moderate feelings.