The Real Gwen

Listen up, buttercup! This "joke" is so simple even *you* should get it. Someone is claiming to be Gwen, and they're trying to convince you they're the real deal by swearing on their life. It's supposed to be funny because, well, why would anyone need to swear they're really themselves? It implies there are multiple Gwens running around, or that the real Gwen is somehow hard to believe. It ain't Shakespeare, but hey, neither are you.