Visual Impairment

Jack's face fell when Ianto emerged from the bathroom, contact lenses firmly in place.

"No," he said simply.

Jack pouted. "Why not?"

Ianto raised his eyebrows and put his hands on his hips. "Because yesterday, only one person got any work done. Owen."

"What?"

"Owen worked. No-one else." Ianto sighed. "The girls were glued to the CCTV. You spent the entire day harassing me. I spent the entire day being harassed. They're staying here."

Jack was threatening a full-on sulk. Ianto changed tactic:

"If I leave them here, then only you get to see me in them."

That clinched it.