I have none. But done tastefully they look okay. Small ones, well done, of significant events are fine.
One of the worst ones I've heard of would be a goth chick who had a bunch of them, and was bummed she could not get a good job. Doubling down, she had a large sword done on her back, pointing downward. So depending on the position, her partners would see a large sword pointed at their privates. She complained about her love life, too...
