Blow Your Own Horn

Somebody once accused me of blowing my own horn.  I told him that A) I've never played any instrument other than those plastic recorder things in elementary school, let alone an actual horn; 2) even if I did play the horn, I most certainly would hope that I was blowing my own instead of somebody else's, 'cause, eww; and III) EWWWWWW.  Some people have no sense of good hygiene.