A car window decal that lets people know your sperm isn't being used for creating a family.
For you, family means a wife playing tennis, two kids playing soccer, and a dog and a cat. For this guy, it happens to be some lotion, a box of tissues, and the thousands of amorous ladies and gentlemen gracing the pages of Pornhub. No better way to let fellow motorists know there is absolutely no baby on board. If you ever meet a guy with these decals on his car, just don't shake his hand. At least, not until he adds a little bottle of Purel to his "family."
Sources: Adult Swim