Pilonidal, you're never going to have one as one is born with the sinus as I was. Let me tell you, when that thing gets infected, it's pain like one has never felt. Another awful thing is that it's always draining some foul smelling exudate (but you begin to worry when it stops 'cause it's going to be infected). I've had to have mine lanced 3 times and it's NO fun. Should have had it out, but I didn't want to be off my feet for so long. Great name though, like you told me, you can always use that one for a screen name without getting "that name is already being used!" John