Bobby, on a binge and still dressed only in his long-handles, cackled, hopped, and did a do-si-do.

NPR: Excerpt: 'The Prince of Frogtown'

But their example most plainly shows that sociability isn't a one-step but a do-si-do: a continually reciprocal dance of body chemistry and interaction.

WSJ: Looking Beyond Oxytocin, the Love Drug | Marvels