He wouldn't have been startled. As it was, he was probably going to move things too quickly because he was inexperienced and didn't really know the right way of going about things. Once she deepened the kiss, Benjy pushed back, meeting her tongue with his own and moving forward to push their bodies together. If she wasn't going to do it, he certainly was. He rocked against her, completely unphased by the fact that they were already both naked.