Ben was completely wrapped up in what they were doing. During that moment, nothing else in the world existed to him. His hands were roaming like that of a typical rushed teenage boy.
When she tugged his shirt over his head, he used that opportunity to relieve her of her shirt as well.
Honestly, when she spoke, he didn't really care about what she was saying. He mumbled a "mmmhmmm" and then their lips were together again.
That was definitely all he wanted at the moment. They could talk later if she really wanted to.