Chikusa's response is a predictable whine. It's true; Ken hates being injured, if only because it restricts his ability to do whatever he wants. "When can I move around again, Kakipi? I wanna do stuff. I wanna fight, byon. I wanna have sex. I want gum, byon. I want to see Mukuro-sama."

Basically, all the things he couldn't do or couldn't have while he was captured. Knowing Ken, he'd do all of them at once if he could.