The key in making this tool work is anonymity. Nobody can see your choices, and you can't see anyone else's, unless there is a mutual judgment made. You can have a list of 'your interests' that is completely anonymous, private, and discrete.
How does Bang with Friends work? Just access your Facebook account from your smartphone to see your friends - without them knowing, of course. Once there, you just choose which of your friends you'd like to 'bang', and let time do the rest.
If one of your 'bangs' also chooses you, the application will send the two of you a message so that you can work together to bring the app's purpose to fruition.