It's a visual image, it calls for attention by default. The size, location, and target audience do not override the fact that it's designed for visual attention.
Again, nope.
I have one, no one would ever know. Heck, I forget most of the time.
I did it for ME, for no one else, that's why, as Ive hinted, it's hidden. Again, strip me down (Im sure you and your friends would love to, but, please, no) and you'll not see it. You could spread my butt cheeks, lift my sack and peen, look between my fingers and toes...nah, not visible. Shave my head, look behind my ears, on the bottoms of my feet, and still nothing.
But sure, keep backing up BB thinking that they are only for grabbing attention and screaming out 'LOOK AT ME! LOOK AT ME!'