Quite frankly...
implies that there is more to be said, but better left unspoken, albeit an honest statement of affairs, but again, left unsaid.
Person 1: The date is Feb 14, 2069 and I still have never held a girl's hand
Person 2: Quite frankly...
Person 2: Quite frankly...
Quite frankly
A phrase Donald Trump uses in every sentence on TV, or on an interview
Donald trump said, “quite frankly, abortion is wrong”.