When magazines interview covergirls they mostly trot out the same lame, management-scripted answers to bog-standard questions. We know they don't really fantasise about having a threesome with Angelina Jolie and Pamela Anderson or wear 6in-heeled PVC boots in bed. We know their big nights out really involve six Bacardi Breezers, a spin round the dancefloor to Beyoncé, and a fumble in the back of a cab with a footballer.

Amsterdam's Ancilla Tilia is different. She thinks about sex a lot. Nasty, dirty, kinky hardcore sex. She analyses it. Has it. Drips it. Her model name means slavegirl in Latin. She's been active on the Dutch fetish scene since her teens ("Shhhh!" she says, "I was illegal!"), is heavily into BDSM, and is the first ever Dutch fetish model. Yes, really. She thinks that's something to do with the fact people in Amsterdam can literally walk down the street and see naked women sitting in red-lit windows, or stroll into a bar and see household objects being inserted where no household object should ever be inserted.

"That's why," she says. "People don't care. They see it on the streets every day... I dunno. It's good for me, though."

Ancilla has always known she was into kinky sex. The first time she went on the internet, she did a search for S&M. She's a full-blown submissive, relishing having her picture taken for Bizarre with a ball-gag stuffed in her mouth, although she isn't so keen when we bring out a whip. For a sub, she's very domineering when it comes to knowing how she wants to be portrayed, and is protective of her image: "I've done shots with whips before, but it's not me. I'm really submissive. I was on the BDSM scene long before I started modelling. That's really what I want to do. That's a part of me I want to portray. I've done the whip and mistress thing, but that's not me, and that's not why I started as a fetish model."