Kourtney Kardashian wears Travis Barker's Underwear under her Skintight Dress

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During the  promotion of her upcoming third season of her family's Hulu series,

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Kourtney paired the Barker's underwear with her skintight dress.

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The dress had sexy low-back detail that was held together with silver heart chains.

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Surprisingly Travis' black undies were undetectable.

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On the Oct. 6 episode of The Kardashians, she said about the effects of IVF treatments -

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"My body has changed, but it was all of the hormones that the doctors put me on,"

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"It's taken me a lot to get me to the place of feeling really comfortable and happy with the changes."

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"My ass is amazing." - She added further.

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"I'm so into my thicker body,

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I looked at photos of my body when I was so skinny.

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It is cringey...I used to always say this: When I'm super skinny, just know I'm not happy."

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