Yknow Cassius strikes me as the 'head in lap' kinda guy, like if its a moment with just the two of you alone and your hands are preocupied with something he'd first sulk (no cuddles) but eventually he'd either wrap his hands around your waist- or simply rest his head in your lap and nap. Soft, Comfy, Safe. ...he wouldnt mind if you played with his fur a bit too, the more affectionate touch the better.
Now if you wanted to rest your head in *his* lap he'd probably be bit flustered, but he's so excited you asked. He will probs hesitate at first (ESP if its not in the comfort of his room) but eventually he'll give in by patting his lap and giving you a "Fine. But be quick before I change my mind." Or similar comment. He'd try to act casual about it all, but he wouldnt be able to help himself from playing with your hair and looking down to admire you.