We've all heard tales of sexual performers who can enjoy marathons of six or more hours without flagging, yawning, or getting a cramp.  But honestly, nowadays, unless your a Hollywood star, who has the time?  50 ways to sexual ecstasy offers up a range of techniques and tips that you and your partner might not have thought of - or heard of - with the aim of having fun and fulfilling sex that doesn't take all day (or Night).