How to ask my boyfriend for something kind of specific?

A couple of days ago me and my boyfriend were in the bathroom together, I was on the toilet and he was about to get in the shower.

Before he got in he grabbed my head and started moving his hips waving his dick in my face and smacked me with it as a joke. We both laughed but at the same time we weirdly turned me on, and it keeps replaying in my head. I wish he continued and just shoved it in my mouth.

Whenever I give him head I pull his pants down and stick his dick inside of my mouth myself (I think because he doesn’t want to seem forceful), but I have a fantasy of him just shoving it in my mouth and fucking my face. I want him to do that thing where we waved it in my face again and just shove it in my mouth but I’m not sure how to ask because it’s kind of specific. How can I go about asking this? Is there a specific link for this?