"Oh, careful..." She smiled, and tried to keep breathing past the idea that Severus Snape was fingering her hair. That idea did very strange things to her, not the least of which was remembering she wasn't fifteen any longer and he wasn't her professor...
"Offer things like that, and I'll be underfoot whenever I'd like..." She was aware her voice was suddenly a bit breathier than it had been, her fingers not quite still on the fabric of his trousers.