Special move on NPCs?

Hey all, does a player get their special move benefits if they have sex with an NPC or only other PCs? The book says "if you and another character" which seems to imply both. But some of the moves modify Hx which is for PCs only. So now I am thinking its PCs only? Is that right?

It applies to both. If there's no Hx modify, modify no Hx.

So there are some moves which only modify Hx. Does everyone else run it such that the moves apply to PCs and NPCs?

RAW is that it applies to both.

Check out the character moves section starting on 216 and the text for each sex move.

Oops, should have noticed that in the rules. Thanks!