The great thing about graphic tees is that you can choose  pretty much any design you can think of.  If you want to do it as a couple, the idea is to take an image and print it large on two shirts, so that the image is displayed when you are next to your loved one.

You can choose Valentine's and romantic designs, with hearts, this year's date and some other element that shows the  great love they have for each other.  

Even a text message, a phrase that summarizes your love Couple T-Shirt Online and that is only completed when you are with your loved one. As for typography, your friends at  Fruit Shirt can help you design the t-shirts to your liking and style.  

Another idea is to simply find something that you both like, it can be a movie, a hobby, a profession or any other element, and perform this technique. Perfect to wear with your partner.