Disclaimer: I don't own Farscape.
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"Aeryn, I thought we'd talked about this: D'Argo, babysitting, yes. Chiana, babysitting, no!"
"Hey! Why's D'Argo all right to trust with the little narl but not me?"
"Because D'Argo knows which end is up!"
"When you left, he didn't have any clothes on. How was I supposed to know which end the die-fer goes on?"
"The diaper collects bodily waste. Which end do those things usually come out of?"
"What about vomit, huh? That's a waste."
Crichton could only sigh.