Erotic Calendar
Idea suggested by Lucía.
Intimate, personal, and for your partner's eyes only. An erotic calendar with more or less spicy photos of yourself ensures surprise on the face of the recipient because it's something few people would think of. Why have calendars with photos of models and the like when you can have the image of your loved one reminding you how much they like and love you?
To carry out this idea properly, besides courage and a little shamelessness, you'll need a computer, a digital camera, and a bit of IT skill. Any program like Word will allow you to create the calendar easily. If you want to be a bit more sophisticated, search the web, and you'll find several programs specially designed for this task.
As a final suggestion, add spicy and affectionate phrases on days that have special meaning for you. This will make the gift even more unforgettable.