Her fingers are tugging on his curls as he continues paying such beautiful attention to her nipples. She doesn't even realize she's doing it because all her attention is on her breasts and on the fact that Sherlock is making her feel like this and pulling her trousers off at the same time.

She's not sure why it should surprise her that Sherlock is a quick learner, even at sex. He's so talented at taking in external input at a staggering rate, processing it and using it to inform decisions. He can do those things before most have finished taking in the data. Of course he can read her like a book and figure out what to do next. What is staggering still is that he's focusing that kind of energy on learning about her.

She helps him rid her of her trousers by shimmying her hips a bit to get them down her thighs. The awkward part will come when she's got to step out of them. They always get caught round her ankles.