I'm not sure why that I accidentally read "kicap fatimah"..... don't mean to joke around

Rather than asking "should i do for him?", the right question is "do i want to do take it?". If you are not happy about it, just tell him.

You do have concern, it's not like you totally fine with it. You might or might not able to tell a solid reason why u don't like it, but in short you are not comfortable with it.

If you guys are intimate in such a way, both of you should not have difficulty to communicate real thought and feeling. If there is, both of you need to deal with it.

So, you need to tell him that you don't want it. If he ask why, just tell him you got dilemma in this. It's good for him but not for yourself.