Before seeing "Pirates of the Caribbean: On Stranger Tides," I had already reached my capacity for "Pirates of the Caribbean" movies, and with this fourth installment, my cup runneth over. Indeed, so doth Capt. Jack Sparrow's, as he obtains two chalices to use while drinking from the Fountain of Youth and seeks a mermaid's tears to invest them with magic. There's always a Catch-22. You fight Spanish conquistadors and the British navy to find the bloody fountain, and now you need a weepy mermaid.