The importance is in the scene.

This is from Noin's first ep (if I recall), the 
famous "bar scene" between Noin and Zechs. Zechs 
is on the phone, and Noin is getting a bit fed up 
at being ignored, and has decided to proposition 
him, but in a very creative manner. She's very 
seductively clanging the hilt of her sword 
against his...

Hehehe...

-Misha