Rob Kardashian & Blac Chyna Kiss On Cam, But ... Where's the Love??

021816-rob-chyna-instagramBlac Chyna finally planted her lips on Rob Kardashian for everyone to see, but something might be missing here.

Considering Rob and Chyna have been almost inseparable for about a month now -- you'd probably expect something more passionate than a BFF-like peck on the cheek for their first Instagram kiss.

No doubt, BC's been great for Rob's confidence and his workout regimen, but c'mon -- where is the love? Where's the passion?

On the other hand ... this is the happiest we've seen Rob in years.