"I'm not particularly proud of it. But it's a bit of a '50s thing, I guess," Affleck, 38, tells Ellen DeGeneres of the couple's holiday-shopping arrangements in an interview airing Wednesday on The Ellen DeGeneres Show.
"Because my wife is so capable and because I'm less so, she does a lot of that work, and I kind of root her on. I'm encouraging."
Affleck explains that Garner, 38, is just an efficient Christmas-shopping machine, while he sits around sputtering over the single gift for which he's most responsible.
"It takes her as much energy and effort to buy like the 20 gifts we're going to buy other people as it does [for me] to buy her gift," he says. "I spend the whole time fretting about that and being nervous and hoping she likes that."
And often, it doesn't end well. "I end up at like CVS on the 24th being like, 'Maybe she'd like a little Godzilla that goes around,' " he says.
"You talking about your wife or your kids?" DeGeneres asks.
"My wife," Affleck replies. "My kids actually would like that."