Embarrassed, the Doctor scratched a spot behind his ear and smiled sheepishly. "It was a really odd regeneration. But the combination isn't as bad as you may think. More like... sweet and savory at the same time... smooth and crunchy."
"I think the term you humans use is midlife crisis, but yeah..." he smiled at Bill. "Four is plenty."
He became just as serious to match her mood. "I promise to be more conscientious and not keep things secret. And if you need to know something, I'll tell it to you."