Write a romantic and sexy short story that features your sweetheart and yourself, in the style of a paperback romance novel. If you want to really be charming, get an artist (it is not as expensive as you think) to render a drawing of you and her/him to act as a cover and present it to your sweetheart. You can hire a writer to write a story for you that features you and her/him so it will surprise both of you if you want.