David Sherratt, 18, is a chemistry student at Cardiff University. He has never had a girlfriend and isn’t planning on finding one. Not now. Not ever.

“Hook-up sex is too risky for words,” he says. “Girls can wake up the next day and claim you raped them. I’m genuinely too scared to go near a woman — just in case. At university, I’m made to feel like a rapist all the time… I’ve never had a relationship and I don’t think that’s going to happen anytime soon. It’s just too dangerous.”

Neither does he see the point of marriage, since half of them end in divorce. “Marriage is like playing Russian roulette with three bullets in the cylinder” he says firmly. “I’ve never been interested