Her jaw dropped slightly as she listened to him explain things. And she found herself closing her eyes and picturing things exactly as he was explaining it. Before he was through she was biting the corner of her lip. Her blush was darker, as she pried one eye open followed by the other, once he was through. "Actually, I only know the chemical reactions of... I haven't studied genetics. Yet. I mean I know the basics."
Sarah paused, knowing what she was about to say was probably inappropriate on all levels. And she shook her head at herself. "Forgive me for saying so, that... that was sexy." Alluring. Made her want to go search for books and get started.