Kenny Powers is a father. To an infant. An infant. Let that terrifying concept sink in as you watch him arrive late to his son’s first birthday party, make inappropriate sexual advances toward April (his baby’s mother), and accuse her of being a selfish limelight hog. (And in case you are wondering: yes, that is a prosthetic penis on the table next to the cake.) Season 3 of “Eastbound & Down” premieres Sunday, February 19th at 10/9c on HBO.