What?

Two ways to be speechless:
prefaced
"I don't need to say anything to you."
paired with brazos, ojos, and smiles, what need you say?
"Right on," I reply.

or....
 perplexing silence;  Wondering what I said, how it was prompted,
vacillating between melancholy and regret

The latter is old, put in place by a lover  The former is new, born an hour ago, and I'm still high from the fumes.