Why do I keep getting friend requests from total strangers?

And most of them aren't even in my country... most of them are from the Phillippines, strangely enough.

I wonder, am I the only one?
Update: I am male, and people who send me the requests are usually female...

Anyway, I reject them all! :D
Update 2: To be clear, I have nothing against people from the Phillippines (or any other country in the world), but I just can't help but wonder because I don't know them, and we don't have any mutual friends, either...
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