Lice.  I could end it here and leave the remainder open to discussion of your own lice stories, but not everyone has a story yet, or theirs is just being written.  So for the future warriors...  According to Wikipedia: The head louse is an obligate ectoparasite of humans that causes pediculosis capitis.  Head lice are wingless insects spending their entire life on the human scalp and feeding exclusively on human blood. So they're a parasite.  Do you know that most parasites do not want to leave their host?  They have a slew of ways to make sure they stay put.  Lice are no exception.  Their eggs stick to the base of the hair shaft with the insect equivalent of super glue.  They have become treatment resistant to the caustic chemical combinations carried on drugstore shelves.  They are rapid breeders and can easily transfer from one host to another (ie: from your head to your parent, spouse, friend, etc) by hugging, sharing hats, brushes, and hair accessories, and from not pr