As someone who took the “try anything once, twice if I like it” message to heart, I’ve never given vanilla sex much thought. You know - straight up, pretty pleasurable, missionary. No bells. No whistles. No leather.

But I’m going to say something I never thought I’d have cause to: I’m seriously worried about its future.

Over the last couple of years I’ve noticed a slow, but steady, shift away from vanilla sex. There was a time I wasn’t allowed to join in drinking game 'Never Have I Ever', because no-one ever managed to come up with something they’d tried that I hadn’t. At a dinner party a girl once told me I was the “most interesting person” she’d ever met, after I regaled her with stories of my sexual hijinks.