The song "Toothbrush" by DNCE is a pop song about a blossoming romantic relationship. The lyrics suggest that the singers partner can leave a toothbrush at their place, indicating that they are comfortable with the relationship progressing. The song does not provide any information about toothbrushes themselves, such as their ingredients or materials.
Therefore, there are no positive or negative aspects of toothbrushes mentioned in the song, and no information about their ingredients or materials.
