It’s lesbianism: our little secret, for women whose bi-curiosity has become too overwhelming to ignore. It’s “lesbianism” that lesbians will recognize, but have a hard time endorsing without some irony. This is the kind of awkward, lighthearted, lesbianism many women either had – or wished they’d had – in college. This is Katy Perry singing “I kissed a girl and I liked it.” This is an Agent Provocateur window display. The invitation to Skirt Club, a women-only, bisexual and bi-curious sex party, tells you one thing, loud and clear: This may be a girls-only orgy, but it’s not lesbianism as you know it.