threesome advice 🙄🤦🏻

So my boyfriend enjoys lesbian porn and I've always fantasized about a threesome with 2 girls 🤔 sooooooo, I mentioned something like "babe let's have a threesome." And he was like nope. not happening. well, the other day I mentioned it again and he was so turned on by the idea. we talked about how it would go down. he would not be fucking her, he would be doing me, while I play with the other girl. in pretty excited cause like I said, Its been a fantasy for years! My only concern, is how do we find the other girl? we already have set rules, NO FRIENDS and other rules.