I guess it's just a matter of you'll have to ask him each time to do it. If he has mild aspergers, he might not change overnight. If it becomes part of the routine, he might just start doing it spontaneously. If that's what you need to feel satisfied, then you should absolutely want that to be part of the routine and it's not wrong of you to ask for it. My husband wasn't terribly affectionate either, so I would just tell him to hug me right now or I would die or something. He is a little better about doing it spontaneously, but I still have to tell him when I wants me some sugar.