[Kida shifts her positioning and Hellboy does too, mirroring her and propping himself up on his elbow. It's more of an explanation than he'd been expecting, and even so, he isn't quite sure how to take it -- his experience with women is so small that he never really imagined he'd be in a position like this. Whatever this position is.

He's trying very hard to see things from her perspective, to imagine what it would be like to have your duty outweigh your freedom. He looks weird and a lot of baggage comes along with that; not a lot of women can see past it. But at least he has the freedom to love whomever he wants.]

I meant it when I said I wasn't looking for anything. [It's not exactly an answer, but he's still processing this extremely foreign situation. Is she saying that Hellboy can be her... mistress...] You're my best friend, Kida. I don't want to make things complicated for you.

[But also.] I don't know what 'gravid' means.