Boyfriend & I want 3some with other girl, how do I approach girl?

[Michele in Kentucky]

My Boyfriend has asked for a threesome for his birthday and wants me to initiate on my own as part of the turn on for him. I have never been in a threesome or had a sexual experience with another woman, but very much want to do this. I don't have a clue how to approach another woman or how to know if she is interested in other women or a threesome. I don't want to go to a bar and pick up someone who does this every night with someone new. How do I approach a woman and how do I know who to approach?

[K. in Cleveland]

There are so many places online for this kind of thing. Places like adult friend finder and SLS for starters. One can look for whatever they want. Although, it is sort of the e-version of a bar. Another option might be a friend of yours. You might know another girl who might be freaky (in the good way) and can just tell her about your boyfriend's gift and see how she reacts.
You can also use something like Craig's List and post a personal.

You really just need to figure out what feels right for you. But beware, while you're looking for a playmate, you just might see someone you know