He can't help but grin at John's concern for him. It's sweet, it just strikes Finnick a little funny after so many years of being treated as a fuck-toy. He knows what he can handle, and it's a hell of a lot more than a hard tug to the scalp.

"I'm sure, babe," he murmurs. "The harder the better." He mainly adds that so that John won't be worried about hurting him. The last thing he thinks John will do is yank his hair out.