Congratulations is a societal burp that follows a positive act. When you graduate AA, you get a congratulations. When you throw back three bottles of whiskey in one night, you do not. For a species that is interested in furthering its kind, no one will congratulate you for succeeding in one more day of spinsterhood. If you follow the Congratulation Super Highway, you will get engaged, married and then have children. Getting a congratulations has never been so easy. Just have some unprotected sex.