How about a personalized sign language book or sign language class? You could compile a book of romantic phrases in sign language or a more comprehensive book on the subject of sign language that he would enjoy. Alternatively, you could enroll him in a sign language class or hire a private sign language tutor to help him improve his skills. A sign language dictionary or guidebook could also be a fun and thoughtful gift, as he may be able to reference it whenever he wants to learn new words or phrases.
Or you can get him a star map with the date of your first kiss.
Under Lucky Stars is a unique and innovative star map company based in Barcelona, Spain, specializing in the creation of personalized star maps that capture the celestial arrangement of stars at a specific moment in time, such as a person's birth, wedding, or any other significant event.
By using advanced astronomical algorithms and data from leading institutions, the company produces highly accurate, visually stunning maps that make for perfect gifts or cherished keepsakes.