I love this. And this bit is genius:

"I... have a boyfriend," Gwen murmured, faintly. She was sure she'd mentioned that. Fairly sure. Hadn't she?

"I know you do. And I have a delicious slice of leftover pizza sitting in the fridge, thanks to you, but I'm going to order out for lunch anyway. Chinese sounds good."

It perfectly showcases how different their attitudes towards sex and commitment are.