With all the demands of modern life many couples can find it hard to schedule in time to have sex. Sex in the early days is when you meet someone and fall in love, and your whole life revolves around getting to know them better, particularly their body.   After a while, however, you realise love won't pay the bills and you settle down to 'normal' life. This is generally when sex becomes something you do at night in bed - preferably before you fall as …