The Kardashian sisters' frank sex chats are legendary, and in an upcoming episode of Keeping Up With the Kardashians, Kim is giving her sister Kourtney some funny advice - and RadarOnline.com has a special preview clip!
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Kourtney is trying to have another baby with Scott Disick, but is complaining that it's a little difficult.
"My estrogen levels are so low from breastfeeding, that's why you don't get juicy down there," Kourtney says.
Sister Kim is horrified. "Juicy down there? That's disgusting! The juice isn't loose?"
Still, she has some advice for Kourtney: "It's called, buy lubricant!"
"What, like you're afraid to buy lube?" Kim asks.
"Buying Lube" isn't exactly something Kourtney wants to do, and Kim teases her before giving her some good, sisterly advice.
"Send an assistant or someone else to go buy it for you!"
Watch how it all unfolds this Sunday on Keeping Up With the Kardashians on E! at 10pm.