Pleasing her man Kanye West, according to the E! reality star.
"You want your guy to think you're really hot," the new mom explains to Sunday Times Style. "I'll put something on and he'll [Kanye] say, 'No, that doesn't look good' and I'll trust him."
The Keeping Up With the Kardashians' star, who recently showed off her post-baby body in a revealing bathing suit, also says she hopes to lose even more weight.
"I haven't exercised a whole lot so far, just because I've been busy with the baby and I don't want to leave her," she says. "I still have some [baby weight] to go. Atkins worked for me and I don't feel tempted to eat a bunch of junk food. It's just about staying healthy -- it will come off."
Sounds like a good plan to us!
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Gallery | Kim Kardashian's Post-Baby Sightings