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Etymology
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Usage notes

 * As of 2018, this form is more common among younger users; the form with a nose,, is more common among older users.
 * In Russian, an emoticon is separated from the word by a space. If there is a punctuation mark after an emoticon, it is not separated by a space. The full point after an emoticon is usually not written. An emoticon can be combined with the usual closing bracket (provided that it has opened somewhere).
 * Occasionally, the mouth can be repeated as an intensifier, as in :)))); this is similar to the Russian use of ))).