karl loves to have his back tickled. you know, fingers drug slowly and lightly up and down, especially on his sides. in return, he sometimes/often gives me back tickles, or (even better, imho) head rubs. now, i don't know about you, of course, but when i get head/back rubs, i like to vocalize my gratitude. partly, this is a way to indicate which kinds of rubbing, or which areas, are most pleasurable. partly, it's a way to communicate that i'm still awake and enjoying it and so they shouldn't stop rubbing. it's kind of a delicate business though. how much borderline-sexual sighing and moaning should i do? once i've started, silence feels like i'm not just not communicating pleasure, but am in fact communicating displeasure. that's not the case, of course, but that's how it feels. what's a girl to do? how much moaning is too much? (don't all chime in, now)