Telling people how we really feel can be… well, tricky. Even when it comes to writing a simple thank you note: “What if it’s too much? Will they think I’m weird? Is it going to be awkward?” If only there were a surefire way to know how it was going to turn out! Well, this study is getting as close as we are likely to get. Here, scientists tracked how senders and receivers felt about thank you letters, and the results suggest that you should get your pen out: “Expressers significantly under