The caveperson (persons of caves?) theory would also help with why males (on average) are better with directions/dead-reckoning than females (on average — because I’m sure we can both think of women who can find their way blindfolded and men who never mastered the whole map thing). Hunters tend to wander (and need to get back) more than gatherers.
Deb & I work best as a unit. I actually do worse at names and planning and organizing than I used to, because my partner not only does it better but also enjoys it (if we can’t *go* on vacation, she still gets a kick planning one). I do money and driving and cooking. (She cooks for family get-togethers because that’s part of the planning; whereas she long ago stopped asking what’s for supper because I won’t know until I look through the fridge and the pantry to start throwing things together.)
She remembers people and places we’ve been; I, OTOH, remember movies and tech stuff. Together we do okay. ;-)