Corrected entry: As Louis approaches the kissing booth to see Betty, Stan's Darth Vader helmet is laying on the table. Betty disses Louis and leaves the table. Louis removes his glasses and puts on the Vader helmet (pretending to be Stan) and follows after Betty into the moon walk. After they have sex (Louis pretending to be Stan) Louis reveals himself to Betty, and he's wearing the glasses again.
oprlvr33
16th Oct 2007
Correction: There is a long cut between the two scenes, more than enough time for him to sneak his glasses back on. Given the thickness of the lenses, he would need them to see.