Get your heart racing...and his, too (wink).
Why it works: Testosterone levels (yes, women, too have small amounts of it naturally) are highest in the morning. Having sex then also boosts your levels of the love hormone, oxytocin. Schedule an a.m. tryst, and you'll not only feel more vital and alive but also more bonded to your partner for the rest of the day.
Strange, true thing that might convince you: Sex increases blood flow to the entire body, even the brain, which can
keep the synapses firing and the neurons healthy and pumped.
Next: What the happiest people do at work
