My Code Works I Have No Idea Why :/ developer t-shirt. About the uncomfortable feeling when code works but you don't understand why, with the ":/" emoticon capturing the unease and doubt. For programmers who are afraid to touch working code because looking closer might reveal why it shouldn't work at all. Simple text design with the emoticon adding visual uncertainty to the statement. Works when you're being honest about letting mysteries stay mysteries because investigating might break everything. Tech apparel for developers who've learned that sometimes miracles should be left alone and working code shouldn't be questioned too hard.