“Brooklyn psych-rock quartet Crumb know relationships are like baked goods: if you lace them with too much sugar, your brief high is only gonna be followed by a harder low. On their new song “Plants,” the band warps the metaphor with devilish imagination, looking at a relationship that’s a little half-baked, and just too saccharine. “Tell me something sweet/When the day seems so long,” sings frontw”