There's a link above the FB login button named "what will you do with my data?":
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* We go through all of your friends and see which one's have a defined relationship status.
* For each friend we take everything they like and run it against our database to determine which like reflects their relationship status.
* If we don't have any data, we choose a random like and hope it's funny.
The only data we keep are combinations of relationship statuses and likes.