"No I... I follow'd," he said, waving his hand to try and cut her off, though he had an amused smile in place. He kind of shook his head a bit - he didn't really get what had her so attracted to him, or why he was so torn up about it, but he saw other guys around with admirable qualities and - from his point of view - less baggage to haul about that were closer to his age, and he just sorta... didn't really understand why she would want him, when he was clearly so damaged.
"Been a while since I..." he searched for one of her terms that sounded the least offensive, decided he didn't like any of them and went for broke, "'sucked face' with another person. Reckon I could use a bit've practice in that regard. You offerin' t'teach me? Or should I go take lessons'n come back in a week an' see how you like me then?"
He hoped he wasn't saying anything stupid, but he was a bit nervous at how long it had been. And really - one of the last time's he'd kissed a girl he'd wound up unconscious.