Alice explores the world of 'feedism' and 'gaining' - meeting leaders in the fat-fetish porn world and two UK mums who blend sex, food and bigger bodies for a different kind of erotic

Over in the US, Alice meets people tearing up the rule book with 20-person 'polycules' and multi-partner relationships - for more sex but also a deeper connection

In Berlin and Vegas, Alice takes a deep dive into future sex, from cyber-brothels to talking sex dolls and the latest in sex robots