If you're a Google Glass early adopter then smile politely when you receive a quizzical look.
The technology giant has issued an etiquette guide to users of its new wearable computer to prevent them from acting like "glassholes".
Last year Google began shipping 8000 early versions of the wearable computer to "Glass Explorers", at US$1500 each.
Google will roll out its augmented reality glasses to the public this year. But the company doesn't want the thousands of beta-testers to scare the public.
A list of dos and don'ts from Google tells participants how to cope with public interactions. It states: "Don't be creepy or rude (aka, a glasshole). Respect others and if they have questions about Glass don't get snappy. Be polite and explain what Glass does and remember, a quick demo can go a long way."