Illustration: Hannah Robinson/The Guardian Illustration: Hannah Robinson/The Guardian‘There’s no such thing as normal’: 13 essential lessons about sex – from 20 years of Sexual HealingThe Guardian’s sex advice columnist has answered countless questions over the last two decades. As the column ends, here’s what has struck and surprised herPeople find it so hard to talk about sex, so if someone takes the time to sit down and write a question, then send it to the Guardian for me to answer, I always regard that as a great privilege. In the 20 years of writing the column, I have been reminded how many people are still out there, living their lives in quiet desperation about something that’s really troubling them sexually.