Again there were murmurs of plagiarism. “I Kissed a Girl” happens to be the name of a 1995 song by folkie singer-songwriter Jill Sobule. Sobule’s song, a minor hit, is a clever tale of two women who in talking about their boyfriends end up getting it on. Sung by a gay artist, it comes across as a lesbian anthem, rather than as a tease to men, like Perry’s song.

