Garner, who appears in the star-studded rom-com Valentine's Day, told George Lopez on Thursday's Lopez Tonight" that the most important thing guys can do is "acknowledge, in some sweet way … 'I love you.' Just make us feel wooed."
She added: "Write a quick note or pick flowers or pick the grass out of your backyard and show up with it with a sweet smile … You don't have to spend a lot of money, just be sweet."
The mom of two, 37, looked anything but sweet, however, when she mimicked a scene from Valentine's Day and destroyed a heart-shaped piñata with Lopez.
"In Mexico you smash piñatas, in Greece you smash plates. We have the Demolition Derby, but that's it," Garner said. "White Americans, we need to find something to smash. It's good for you!"