Aye bp you look great!!!
As for the horn tip down rule-- I drink from a horn and with people who drink from horns. I've not heard of its being rude to drink with tip up, but it is certainly impractical-- the beer slides toward the drinker's face with a hyperbolic acceleration (due to the curve) and often splashes all over drinker. Every horn has its own special optimum downward curve.
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