When Kevin Youkilis highlighted the White Sox' 7-5 victory over the Red Sox Tuesday night, clobbering a three-run homer off Jon Lester with two out in the fourth, the reaction of the Fenway Park crowd of 37,771 seemed puzzling. No one was quite sure if the crowd was cheering Youkilis, chanting ``Yoooouuk!'' Or if they were actually booing Lester, deservedly so, after the Red Sox lefthander served up a 3-2 fastball that Youkilis launched into the Green Monster seats to give the White Sox a commanding 6-2 lead.