Advice on introducing cuckold dynamic to my girlfriend

Hey everyone, looking for some advice from people with experience.
I’ve been interested in exploring a cuckold dynamic, and my girlfriend seems to have a bit of a playful side when it comes to attention and flirting. She’s funny, a little shy at first, but she does enjoy being desired and noticed by others.
We haven’t had a deep conversation about this yet, and I don’t want to approach it the wrong way or make her uncomfortable. I really care about her and want this to be something we both enjoy.
For those who’ve been through this:
How did you bring it up for the first time?
What made your partner feel safe and open to it?
Any mistakes I should avoid?
Just trying to learn the right way to communicate and see if this is something we could explore together
 
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