Here is a fun trick to pull on your partner. Get a tattoo without them knowing. Now don't get me wrong if you are getting a major tattoo you should at least inform them of your intentions. But what I am suggesting is to pick up some temporary tattoos and shock your partner. I have included a link to a site that sells all sorts of temporary tattoos. Pick something out and order it put make sure you partner doesn't find out. You might have to send it to another person's address to make sure they don't see it. Once you receive you tattoo follow the instructions and place in on your desired location. For added surprise place it on a place only your partner would see. Like the cheek of your butt or down on your waistline. See how long it take for them to find it. I am sure you will shock them if you don't already have several tattoos.
For added effect you can get tattoos that are a bit more permanent Henna tattoos last about a week and some of them look real. When playing this trick on your partner I would suggestion getting something really strange. A rubber ducky on your butt or something that they wouldn't expect you to get. If you can find their name place it on your waistline and see their reaction. Now come on it won't hurt to much most of them go on with water, no needles I promise.
Thanks to Creative commons and Ferdi's World's for the picture.