Jonathan Cheban Gets His Hands On BFF Kim Kardashian's Urine -- For A Good Cause -- On This Week's KUWTK!

That Jonathan Cheban, he’ll never let you down!!
Well, as long as he’s not fighting with your sister’s friends, that is…
Ch-ch-check out a teaser clip of this Sunday’s upcoming episode of KUWTK (above) because it’s all about Jonathan — and Kim Kardashian West‘s urine!!
Wait… what?!
Related: Kim Says Kanye Is Releasing New Music EVERY Friday!
Kim K needs some help transporting urine to the doctor’s office during her pregnancy, so BFF Jonathan is right there — well, begrudgingly — to make it all happen.
Guess it’s not just Big Brother where Cheban excels!!
Don’t forget to watch the whole clip — and SO much more — at 9 p.m. ET on Sunday, only on E!