<human>: Can you give me the gist of the text in a nutshell?

It's a little more complicated than the title says but I couldn't really put it all in and be concise. Sorry. 

We've been together for nearly 3 years now and it has recently come up that she is bi-curious. This is no problem from a "homophobic" point since I don't care if you're gay, straight, bi or asexual, you're a human. 

I want to make sure that she is with someone who is going to be patient and not make her first experience with another girl something she looks back on in disgust, I want her to enjoy that experience. 

This has also brought up the discussion of a threesome. I would not want a threesome since I view it as another form of cheating, but if it keeps her happy I would be willing to consider threesome with another girl. I'm not comfortable with her being with another guy.

Back to the point of the question though, I know her best friend [19f] has been telling my girlfriend how she wants to have a lesbian experience also. I know these two would try to make each other's experience the best possible and I think that this is the best avenue for her. She is very shy and these two have been friends forever. 

If anyone can offer any advice, it would be greatly appreciated.
<bot>: Girlfriend wants to have a lesbian experience, I'm fine with this. I think she should pursue her best friend, who wants it with her, but I don't know how to bring that up.