When Lily was at school, she remembers the boys and girls being separated for a sex education class. The boys were given one booklet; the girls another. “In the boys’ booklet, there was a section on masturbation and there wasn’t in the girls’ booklet,” she says. “A girl put her hand up and said: ‘Why don’t we have that?’ and one of the teachers said: ‘Girls don’t do that, that’s disgusting.’ It shouldn’t be a shameful thing to talk about. It can be a bit awkward and embarrassing, but we should be talking about it.”

Afterwards, Lily, who is now 19 and identifies as bisexual, went online and discovered sex education videos on YouTube, particularly those made by a young woman, Hannah Witton. “Within my friendship group it has really opened up a conversation about things you don’t normally discuss,” she says. “In schools, LGBT sex ed is just not talked about. Sex was never discussed as a pleasurable thing, especially for women.” Magazines such as Cosmopolitan filled some of her knowledge gaps, she says, but most of her sex education has come from Witton.

YouTube sex educators are increasingly popular, and for the young people I speak to, such videos are where almost all their information about sex now comes from. Witton, who is 26 and British, is incredibly popular, with 430,000 subscribers to her YouTube channel and videos racking up millions of views. Why Having Big Boobs Sucks! has received 3.5m views; 10 Masturbation Hacks has had 1.2m. In the US, Laci Green has 1.5 million subscribers and her videos on, among many topics, nudity, vaginas, foreskins and pubic hair reach millions. There are several other hugely successful sex-ed vloggers, such as Shan Boody and Dr Lindsey Doe. In Poland, where sex education was recently removed from schools, young people are turning to vloggers such as Natalia Trybus, while the model Anja Rubik and a women’s rights organisation, Dziewuchy Dziewuchom, have also launched a series of sex education videos on YouTube. Read more via Guardian