Corrected entry: In the season seven episode 'Him' any girl who sees RJ wearing his jacket falls in love with him.However,when Buffy, Willow and Xander are in the Bronze watching Dawn dance with RJ, RJ is wearing his magic jacket but Buffy and Willow don't fall under the spell until they see him later on in the episode.
Corrected entry: In "Him", after Xander has his flashback to "Bewitched, Bothered And Bewildered" he smiles and says 'Good times...', but during that episode he explicity stated that he hated what was happening. Nearly being axe murdered by a crazed horde of women shouldn't be a happy memory, it should be a traumatic one.
Correction: They are far away (across the Bronze), and focusing more on Dawn, so they don't get a full blast of the jacket's power. It's only later when they talk to him one on one that the jacket works its mojo.
Shay