Robin Thicke Sometimes Relationships Slip Through the Cracks

2/25/2014 5:45 PM PST BY TMZ STAFF

Robin Thicke fought the good fight to save his marriage ... taking a hail Mary flight to meet Paula Patton in Canada -- but it must have been too little too late.

Or she couldn't forget all the "crevicing" he's been spotted doing. Yeah, that's a word now.