BAFTA and Emmy award-winning filmmaker Charlie Russell meets the couples who are part of an extraordinary and highly popular new online phenomenon: real couples in real relationships choosing to broadcast their sex lives on the internet. Live and fully interactive, this booming new amateur industry takes the social media concept of sharing everything online to the extreme: thousands of real couples from all over the world are now offering up their sex lives - and the intimacies of their relationships - for a huge audience of online voyeurs.

Sex Diaries meets some of the growing number of men who are aiming to make money by satisfying a variety of sexual and emotional needs for a wide range of clients. There are now more men advertising their services as independent male escorts for women than ever before. But are modern women really ready to pay for sex, or is this all just a male fantasy? And what happens when these would-be gigolos are offered big money for intimate experiences - with gay men?

A new generation of ordinary British men are declaring their love - and their lust - for transgender girls: beautiful women who still have male genitalia. Sex Diaries meets the men who describe themselves as 100% heterosexual and are looking for love in this hidden world. Some want to experience the sexual taboo of a male-to-female partner; others are just trying to find a relationship. Some think they’ve found true love.