Thursday night's GOP debate in Detroit was all about addressing the hard-hitting questions, like, "How big is Donald Trump's penis [1]?" and, more importantly, "What was that white thing on Ted Cruz's lips?" While Cruz talked about federal spending, the thing lingered there long enough for Twitter to explode before he carefully tucked it back in his mouth.

I can never unsee this pic.twitter.com/jx0uApPsNM [2]

— Sarah Parnass (@WordsOfSarah) March 4, 2016 [3]

😳 That white thing on Ted Cruz's lip is driving my batty. #GOPDebate [4] #FOXDebate [5] pic.twitter.com/xMrbvgoPoF [6]

— jill sherman (@justjillsherman) March 4, 2016 [7]

The moment @tedcruz [8] loses the Presidency...white lip thing ... #lipgate [9] #awkward [10]

— Audra Burns (@AudraB603) March 4, 2016 [11]

Was it stray gum? A lil chunk of chaptick? Leftover marshmallows? Tonsil stones? Bile from the thought of Donald Trump? The world may never know.