What do I ask my bf to do while sexting?

I’m very submissive and don’t really like to make requests. My bf is dominant but he’s very shy and asks me often what I want him to show me/do when we’re sexting. I have no ideas, not because i don’t find him attractive or am uninterested I just don’t know what to ask a guy to do. He knows this but wants to satisfy me as much as possible so he prefer I make requests.

He texted me just now telling me to think of things to ask him to do for when we’re sexting later. I don’t want to disappoint him but I’m genuinely coming up blank. It doesn’t help that the one thing I would like to see him do he’s already showed me (I have a piss kink). So people interested in the male species, what would you like to see a penis do?