My daughter, who is now a grown woman, and still an athlete, Always made number 13 her number (basketball, softball, soccer...whatever) whenever she could---I noticed and was intrigued by this, she went to school on a basketball scholarship, is on her second master's degree, has had a passion for justice all her life, especially for racial and sexual equality and has worked as a coach, social worker, ---I presumed someone had told her it was "unlucky" and, as is her nature, she decided to prove this untrue. Judging by her success, it's been lucky 13 for her. I forget where the suspicion comes from-----maybe do a search after work. Love black cats and might collect the shards of a broken mirror to make some mosaic of reflections...