This website, as told in the "about us", is used to be "star-rating system".
If you chat, or send messages, or even comment, dont forget to send your friend star rating.
It is supposed to be like this:
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Friend:*sends photo*
You: Awesome xD, *****/ugly... *** / my eyes are bleeding... *
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Send 1-5 stars.
That´s it! Enjoy :D
(thanks for reading, i give you ***** 
)