What do I say

What do I say when he ask me what do I want
to do to me ?

Could you give more context as to what you mean? Who is asking you what?

My bf is asking , well the guy that I’m dealing with texted me and asked me. I had responded to his text I missed while sleeping and he responded “ I’ll hit u when I’m back “ followed by another text saying “ what you do you want me to do to you” I told him “ oh , u must of text the wrong person , and he said “ no that was for you. Now explain..”

Is he trying to flirt? Have you been flirting via text prior to this?

That’s what I’m trying to figure out I think it’s flirting but prior to this no we weren’t sexting or anything like that. But I was confused if he meant it sexually or like regarding relationship wise.

Unless I’m wildly misreading it, I think it is him trying initiate some flirting, (“what you do you want me to do to you”). But that seems to have come out of nowhere!
Obviously it depends whether you want to keep chatting with him, (and it is a bit of a red flag if he has gone from zero to one hundred), but I’d probably go with something like “easy there tiger” or somesuch so he gets the hint to dial it down.