One of the first & only rules of baking that I learned was that there is no such thing as red frosting. If you put red food coloring in white frosting, it will turn pink. This was OK around Valentine's Day, but at Christmas it meant using red sprinkles instead of frosting which severely limited my cookie decorating abilities. I think this is the only reason why I'm not an Iron Chef.
So I was intrigued twenty years later when I was offered a cupcake with red frosting. Oh the wonders of technology I thought. I took a bite, tastes like frosting mmm frosting. Then I looked around the room & noticed that not only were everyone's tongues red, their teeth were pink. I rushed to the bathroom screaming inwardly "Nooo, I'm a grownup & princess, I'm a grownup princess who is very concerned with dental hygiene". Someone said quick drink lime soda that will help, it didn't. It took over an hour to wear off & my fingers were stained long after that. So if someone offers you red frosting for Abba Jabba (Valentine's Day), just say no.