"I'll hold you to it."

But he lathered her hair thoroughly, taking care to massage her scalp from forehead to temples to the lowest line of hair at her neck. And only once the bubbles were starting to slide down of their own accord did he start to rinse, using the sprayer to add more warmth and more massage to what he was already doing. And the conditioner - well, that he was a bit gentler with, and slightly less liberal. Conditioner, after all, worked differently.