Video: Kim Kardashian, Kris Humphries Have Burping Contest on Dinner Date

Boys will be boys!

When Kim Kardashian sets out to have a romantic meal with her fiance, Kris Humphries, on Sunday's premiere of Keeping Up With the Kardashians, she finds out that her groom-to-be needs to work a bit on his table manners.

PHOTOS: Kim and Kris' whirlwind romance

As the couple look back on their first meeting -- orchestrated by Kardashian's pal, Carla -- Humphries leans in to kiss Kardashian, only to burp right into her face. "Oh my God!" she snipes, before doing the same thing to her man in return. Says Humphries: "Birds throw up and feed it to their children; this is nothing!"

PHOTOS: Kim's biggest TMI moments

Regardless of how her fiance acts in public, Kardashian is confident he'll be quite the family man at home. In fact, the 30-year-old reality mogul told Us Weekly she's hoping to start trying for a baby later this year, after the couple tie the knot.

Planning for the big wedding bash is "very exciting," she gushed to Us at Tuesday night's British Glamour Women of the Year Awards in London. "I'm so excited, waiting for my new life to start."

PHOTOS: Kim's sexy bikini bod

She added that it's a "dream come true" that she's finally walking down the aisle with her guy, 26, whom she began dating back in December. "I'm lucky to have found someone that I'm madly in love with!"

The sixth season of Keeping Up With the Kardashians premieres Sunday at 10 p.m. (EST) on E!

By Allison Corneau for Us Weekly. For more Channel Surfing, click here.