Kim Kardashian & Kanye West's First Kiss ... NO TONGUE.

When in France (or Italy) ... don't French Kiss ... at least, not for your first smooch as man and wife.

Kim just posted a couple of pics from the big event -- including a shot from the moment Kanye was told, "You may kiss the bride" ... and it was closed mouths all the way.

Mrs. West also posted a pic of the happy couple walking down the aisle after tying the knot -- with baby North looking on.