Like dad jokes, Dad Facts are short, often contain a pun, and are designed to keep dad entertained for a while. From the 200-odd entries--and odd they are --dear old Dad can learn about weird science (what did doctors insert into a blind man's eye to restore his sight?), the animal kingdom (which animal can breathe through its butt?), health (what daily activity is more hazardous than licking a toilet seat?), history (why was cosmonaut Sergei Krikalev called the last Soviet citizen?), popular culture (what bastion of libertine values was originally a subdivided ranch founded on sober religious principles?), and gross-out statistics (which household item consists of 70 percent mite excrement after ten years of use?). If you love your dad, make sure he gets 100 percent of the daily requirement of Dad Facts to prevent the early onset of MADDAD (Middle-Age Dour Dad Amusement Disorder).