I'm not naughty enough...

My boyfriend said that he sometimes wishes I was more naughty. He said at times I am but not a lot. How do you be naughty?! I mean I know how but I feel insecure when I try and be more sexy. Idk what to do? I want to slice things up for him. I want to surprise him. He said that me not being naughty doesn't bother him but that there are times when he wishes I was more naughty...