http://www.itm.it/avviso_ts/eng/p_avv_ts.htm

"...do not breath directly on "The Stem". Do not stare or point at "The Stem". This is impolite and you will anger "The Stem", driving it to break and causing you to lose control of your bicycle..."

Okay, that wasn't in the warning. But that seems like a lot of worry to save a few grams...