The Mets failed to regain their manhood tonightThe New York Mets offensive impotence continued as the team slid into beautiful Chavez Ravine.   Beginning a 4-game series at the Los Angeles Dodgers brought no release for pent-up Mets hitters.   LA starter Hiroki Kuroda (8-8) held the Mets scoreless on 5 hits and 1 walk over 8 innings.   The Mets countered with their own Japanese hurler and Hisanori Takahashi (7-5) held most of the Dodgers hitters in check but Matt Kemp destroyed Takahashi's young girl dreams of Vassar with an RBI double in the 1st inning and a solo home run in the 7th that gave the Dodgers more than enough offense, despite their measly total of 4 hits as a team, to defeat the flaccid Mets.   Hong-Chih Kuo pitched a scoreless 9th for his 3rd save.   Los Angeles 2, New York scoreUpdate:   Nieve DFA'd most likely for Acosta.   More tomorrow when all the sensible people are actually awake.