For our first Christmas as a married couple, I created a pin-up style calendar for my husband on Shutterfly. [Pro tip: they have great discounts around the holidays!]
I won't divulge any juicy details, but the process of putting together something I knew he'd like looking at was really enjoyable! You can take your own photos at home, or hire a boudoir photographer if you're not feeling terribly proficient with a camera.
Just remember that some photo-book websites may have content filters, so that may be something to keep in mind depending on how spicy you'd like the photos to be.
Here are a few photo ideas to get the creative juices flowing:
Do they have a motorcycle, boat, or car that they love? Take a few photos posing next to it.
For their birthday month, incorporate a cake or maybe even some confetti.
Is there an outfit they really love on you? Try it on for a few shots.
Take some pictures wearing an article of their clothing.
Trust me, your lover will cherish looking at you all year long!