He would apologize, just as soon as he figured that out, rather than being overwhelmed by his own curiosity.

Like now, as his voice took on a note of chagrin.

"My apologies, Cridhe. I didn't mean to overwhelm you." He nodded knowingly. "That does sound like the Doctor, doesn't it? This 'Flesh' sounds absolutely extraordinary. Do you know who originally created it?" He tilted his head, curiously, thinking on what she'd said. "Do you still have that information? How were you able to keep it from becoming sentient?"