*It was strange to talk about, and strange to think about. Having children was so far from her mind but one day...with him, would it even work? Biologically? It was a part of him that was very human, anyway. She shook her head slowly from her thoughts, blinking at him shyly*

It works by... Wait. I think you should find a book about this stuff, or ask someone else. This isn't the kind of conversation people usually have with their girlfriends... It's just biology. Or chemistry. Or whatever. It always works, unless I forget to take it, or unless I've been throwing up a lot. And in those cases there's always - well, something else that can be used.

*Faye uncrossed her legs, then crossed them again, disliking this conversation so much because she shouldn't be giving sex education to the guy she really wants to sleep with. That's just...strange. And she really doesn't want to put him off*