Recently I discovered something called key caps! This is the cutest idea ever, and must be a Japanese invention as they are the Masters of Cuteness when it comes to things like this.
Such a great way to personalize your keys. They are cheap and you can get what ever kind you desire on Ebay.
Tip for the man: Presenting your girlfriend with the key to your apartment: but a cap on it! You will score extra points for cuteness ♥
My keys.. wish I had a bunch: