The pair appeared in the skit, with Kutcher, posing as a tennis coach and younger lover of Diaz' ageing character Kiki, the author of a book teaching woman how to "bag a younger man".
When grilled on his taste for older woman, Kutcher, 30, teased 45-year-old Moore - who also made a brief cameo appearance on the comedy show - and made a reference to his friendship with her ex-husband Bruce Willis.
In character, he said, "I love it. There's so many reason I prefer older women. They usually have tricked out kitchens and sometimes they've got those donut makers. And their ex-husbands have been pretty cool so far.
"They're kind of like your favourite pair of shoes. A comfortable worn-out pair."
Source: WENN