Next time you're on the loo, try stopping yourself peeing mid-flow. The muscles you clench up to stop the flow are your pelvic muscles. You can repeat this exercise any time, anywhere – in fact, right now at your desk! Strong PC (pubococcygeal) muscles mean stronger orgasms, so spend a couple of weeks 'working out' and you'll be far more delighted with the outcome than any weight loss at the gym…