I saw a comment once about cosplay "breast armor" that if someone falls down while wearing it, the cleavage bit (which is, of course, a ridge on the inside) can crush your ribcage, and they wince whenever they see a costume like that.
__________________
_________________
|...............| We live in the nick of times.
| Len 17, Wid 3 |
|_______________| [pics]
|