Lillie Yifu (April 11 2007) Second Sex Second Sex Image:Lillie Yifu 02.jpg Lillie Yifu has been described as a slebrity for her unapologetic and unabashed "blog on sex by a top escort,", 2nd Sex. In addition to being a blogger and writer, she's also a builder and avatar designer. Her column for SL Looking Glass, the Second Sex, offers advice on how to get the most out of sex, that just happens to be happening in Second Life.