Pretty much says it all in the title. Drinking nectar gives random fizz moodlets like suspicious fizz ect.
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Ideas
Just popping by to add my own input regarding this issue as well. Whenever my Sims drink a juice fizz made with five apples only, they still end up getting the Dangerously Fizzy moodlet including the PØŞŞ€ŞŞ€Đ walk (though not the Infected trait itself). Other times they may simply throw up, even though the juice is normal quality.
Am on PC and not using any mods.