Us Weekly exclusively reported this morning that Serena Williams is dating Reddit co-founder Alexis Ohanian. A joke? You’d be forgiven for thinking that, but “Exclusive: Serena Williams Is Dating Alexis Ohanian, the Co-Founder of Reddit” appears to be as real as any other Us Weekly post. It’s nestled on the website right in between “Khloe Kardashian Cuts Off Her Long Hair, Gets Lob” and “Russell Brand Slams Ex-Wife Katy Perry’s ‘Vapid’ Lifestyle.” Serena Williams Dating Reddit Guy. Okay.