I think that Kagi returning breasts and birds is a good thing. Technically, your search is ambiguous, and by returning a mix of both result sets, Kagi is telling you that you need to refine your search terms if you want to focus on one of them.
Maybe that also points to a possible feature: Kagi could explicitly ask which search path you want to take. But I wouldn't want Kagi to make that decision automatically, because that's what Google does: When in doubt, you simply get what the majority wants. You look for information but get shopping. You try to refine your search, but Google simply crosses out some of your search terms and returns you to shopping anyway. You look for expert information but get beginner advice (because 90% of users are always beginners, no matter what the subject). Search engines drawing conclusions like that makes a lot of niche things on the net almost impossible to find. I'm glad Kagi isn't like that, and I'm crossing my fingers that it will never be.
(And ironically, if Kagi were to go by common user intent, there would be no birds in your search results whatsoever. 😉 )
