BBC.COM - Apr 26 - A scientist at Queen Mary University, Prof Khalid Khan, has reviewed dozens of scientific research papers on attraction and online dating. His research made clear that some profiles work better than others. He said people should spend 70% of the space writing about themselves and 30% about what they're looking for. Women are more attracted to men who demonstrate courage, bravery and a willingness to take risks. Usernames that starts with a letter higher in the alphabet do better. According to an algorithm devised by mathematicians, the chance of picking the best date is highest if user rejects the first 37%. He/she should then choose the next person that's better than all the previous ones.