His mind occupied by his last patient, Owen doesn't think about knocking on the door of the nearest supply closet. He opens it and is confronted by the sight of two people entwined with each other. Neither of whom are wearing pants.
"Oh hey, Hunt," Mark greets him, moving to shield the half-naked nurse between him and the shelving. "This is why you always knock at Seattle Grace."
Eyes averted from Sloan's bare bottom, Owen slowly backs away.
"So uh, Altman doesn't need to know about this," Mark continues. "We're just ... casual. Right?"
Owen shakes his head in disgust.
"Is that 'no', you are going to tell Teddy, or 'Mark, you are not an officer and a gentleman like myself'?"
Owen looks at Mark, incredulous.
The other man coughs. "Nod if you're going to tell Teddy."
Owen shakes his head again and leaves the closet.