So uh, there are attractive girls on Fiverr that will pretend to be your girlfriend on Facebook for a month (friending, n posts/likes on your posts per month, etc) for five dollars. I paid two of them to "fight" over me just to troll my friends. It turns out this piques interest in other women :-P
Because you don't want the people in your life knowing that you pay money to manipulate and deceive those around you? Seems smart to keep that a secret.
[edited because I was unnecessarily brusque.] It was a practical joke, pretty much at my own expense, and I told my friends afterwards. The "joke" is that two very attractive women fighting over me is very unbelievable.
This is why I don't use my real name on HN.