For example if you ask, "Can I give you a hug?", you've double creeped me out.

It seems to me that if we update to be less creeped out by people asking for permission that we don't end up granting, we will make it safer for people to ask for permission. This means that ① some people who might otherwise not hug, but whom we would like hugs from, might be more likely to ask and thence to hug; and ② some people who might hug without asking will instead ask and take no for an answer.

So, encouraging asking will get us ① more wanted hugs, and ② fewer unwanted hugs.