What can I do to him?

Today I am leaving for school and in the afternoon I am riding the bus home with a friend. Well my boyfriend rides her bus. And I wanted to do something that will make him go crazy.I am not very experienced with the whole seducer thing. So I have no idea what to do. I wanted to do something so y and so seductive....but the only thing I can think about doing is kissing him. He is a very horny person. lol. But we were talking last night and he sounds all exited about it. So please help me think of something. Thanks =)