I could never say what my favourite bukkake scene is, there are just so many!
I am partial to a certain scenario though; one girl is the target for the cumshots, and another one acts as a coach. That is, she holds the target's face in the right position for guys to dump their load on it, maybe gives some encouragement to the guys or girl, and generally takes pleasure in seeing her girlfriend get plastered. And she doesn't have to stay passive either. Even though she is not the target, there is no reason she shouldn't eat some cum too! So I like it when she licks it off the target girl's face, or off her hands. Followed of course by some swapping and a nice cum-kiss between the ladies.
Some examples for your amusement:
MIGD-561
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DRD-063
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MDLD-033
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DRM-007
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