Oh lawd -- we just KNEW they couldn't stay away from each other! Kylie is SO f-ing into Tyga is pains us to watch, but here we go again ...

The off-again-on-again couple hit up Nobu West Hollywood for some early Thursday evening sushi. Of course they arrived in Kylie's red Rolls Royce and she was dressed to the nines in a sexy nude body-con dress, black silk trench and lace-up black booties. Tyga, meanwhile, was in shorts, a tee-shirt and Jordans and he chatted on his phone while his sexy girlfriend shows off her hot bod and he doesn't even pay attention.

Kylie, just Wednesday, professed her love for Tyga on social media, calling him her "husband" in THIS Snapchat video. Barf!

They made their debut as a back-together couple earlier this week at Kanye West's "Famous" music video launch event in LA. It was at that very moment, we knew these two would probably walk down the aisle together in the next two years, with Kris Jenner orchestrating a massive TV event for public consumption. Right?! Well apparently our readers disagree ... 76% of you voted in favor of the couple splitting again soon due to Tyga's infidelity. Hmmm ...