Anyone who's spent time with toddlers knows the drill. Three-year-old Oakland smiles mischievously as she does the very thing her uncle just asked her not to do. Meanwhile, her eleven-year-old sister Kinley has always been the compliant one, listening without question. The contrast is striking, but it reveals something profound about human nature: we all struggle with selfish instincts, and unfortunately, these behaviors don't simply fade away as we age—they just look different.