Because the people asking for a source have careers and, like myself, don't have the time to search for a non-existent source some neckbeard is claiming exist.
Why can't you just stop being a pretentious troll and just show the link your source? No one with the least bit of sanity would take the word of an anonymous person. That's why you're being asked for the source of the information you "Put In Quotations." When you correctly paraphrase or cite a source you always provide the source of the information you're paraphrasing and or quoting to your medium.
Taking contraceptives that young would most likely stunt their growth. You claim to have researched this study and no links? Shame Edit: I took a quick glance at your comment history and your initial comment makes a lot of sense now lol