A) Cheesy, but could work.
B) "And I haven't even told you what I'm going do with the whipped cream!"
My favorite, spoken to me by a girl who was the last person in the world who I'd ever suspect would say such a thing (the quiet, innocent, demure type):
Girl: *makes beckoning motion with her finger*
Me: *going over to her* Yes?
Girl: If I can make you come with just one finger, imagine what I can do with my whole hand!