No offence but according to your profile you are a native English speaker, based in the USA, and you are an academic. If you opened a leaflet and saw "You opened this why?", what would you think about it?
Also, as a native speaker, it's important to make sure that the learners on this forum see correct written English from you. In post #3, you have missed a space after a comma and failed to capitalise the word "I". The learners here will assume that a post written by a native speaker is written correctly, so please double-check your posts are correct before submitting them. It makes life for all of us here much easier!