You make sure to tell her that, Ribit... yellow roses aren't necessary a good thing, you know...
Yellow Roses: Yellow roses are an expression of exuberance. Yellow roses evoke sunny feelings of joy, warmth and welcome. They are symbols of friendship and caring. The yellow rose, like the other roses, does not carry an undertone of romance. It indicates purely platonic emotions.
http://www.theflowerexpert.com/content/aboutflowers/flowermeanings/rose-flower-meanings

What is the point of rules that are not enforced?