There are many reasons to choose to live child-free. Some very valid reasons are overpopulation, living with a smaller footprint on the planet, and not wanting to raise fodder for the war machine. Choose from these t-shirts and get the word out.
Had a vasectomy? Want to avoid awkward first date conversation? Here's a great design to help you meet other child-free by choice friends. A friendly cowboy waves and says "Happily Shooting Blanks."