A long time ago, people who wear T-shirts don't pay much attention to the cutting of the shirt. Comfort is everything. However, that has changed. Many people are wearing T-shirts for casual outings. And more and more young people are paying attention to fashion. In other words, the cutting of the shirt matters as well. Finally, we come to the design of the T-shirt. For couple shirts, you are allowed to choose custom designs. Be sure you do your homework to find out what your partner likes. Otherwise, he (or she) won't want to wear the T-shirt together with you. If you haven't heard of a couple t-shirt you might not be in a relationship. A couple t-shirt is not the same thing as wearing the same shirt. It is when two people are wearing complementary shirts. For example his shirt might say Mutt and yours might say Jeff. Or his shirt might say Black and yours could say Berry. It is the combination of both shirts together that creates a message to others. It will also signify that you are together and in a relationship.
There are two issues the couple needs to agree on when it comes to design - colors and the actual graphical image that will be printed on the T-shirt. The graphical image can be a picture, or it can be a string of texts. Some couples prefer using texts because the message is clear and concise. There is no guesswork involved. Someone who sees the couple walking down the street wearing the T-shirts will immediately notice that they are deeply in love. By all means if you can finish each other's sentences and are in a lovey dovey stage that is the pivotal time to buy a shirt. Most guys wouldn't normally wear a shirt anyway, but if they really care about you they'll do it for you. And best of all they are neat and you can find something that both of you will like. Or you could compromise and find something that suits your style and his and get two sets of shirts.