• Lena Dunham admitted she once wrote into an advice columnist when she was 19-years-old to ask about the etiquette of disclosing one's virginity. "I'm a 19-year-old girl who has been reading your column since its inception, and I've always wanted to write in. Well, I finally have a question. Once you're 19, people seem to expect that you've done it six ways to Sunday," she wrote. "So it can come as quite a shock when a girl my age admits that she's still on the v-team. ... It seems to freak guys out, like they think that you're going to get too attached to them if they devirginize you." Aw! Lena! [Source]

• Is there a genetic basis for happiness? You betcha. New research suggests that our genes reward us with "healthy genetic activity" when we do kind, unselfish things, and punish us when we're jerks. Genes are really smart, you guys. [Source]

• You've always been told that exercise will help you sleep better, right? Well new research suggests that sleep actually has a much more profound impact on your exercise regimen than the other way around. According to new research, a bad night of sleep can lead to less exercise, but a good workout session had little or no impact on how well a test subject slept. Well that's discouraging. [Source]

• Those eyebrows! That pout! That singing voice? Yup, Cara Delevingne is following in the footsteps of Milla Jovovich and Naomi Campbell, and is the latest model-turned-singer to try her hand at warbling. Below, check her out with singer Will Heard. It ain't half bad!