The idea of a threesome sounds great in theory... But when we actually start to imagine the logistics of the situation we are riddled with anxiety. Him and you - cool. Him and her - great. You and her? OH MY GOD I'M NOT A PERSON. Well, now thanks to Women's Health, we are privy to the sexpert's top tips for making sure three is not a crowd. Sexologist Ava Cadell, founder of Sexpert.com emphasises that girl-on-girl action is imperative in a threesome to avoid a competitive vibe between the girls. If you are straight, there is no doubt that it will feel a little weird and awkward to get naked with a girl, but these tips should help to ease nerves.

---

  Take it slow There's no need to rush things, according to Cadell - start by kissing and caressing her with her clothes on. There's no need to get into your birthday suits straight away. Start from the top Cadell points out that the scalp is totally underrated when it comes to errogenous zones. A scalp massage will relieve her tension and increase feel-good endorphins. Forearms are also lesser known hotspots. Now that doesn't sound too scary. Get in the Tub Sex coach Amy Levine says a bath is the perfect blend of relaxing and erotic. If the bathtub has a handheld nozzle, use it to stimulate her clitoris. Hands on  "It can be thrilling to feel a girl's nether region for the first time. Feeling her get wet will get you equally turned on" says Levine. She does advise that you cut your nails short first! Play with toys A double dildo is a great way to please you both at the same time. Levine says: "Don't worry if it takes a few tries to get everything arranged, that's normal. Your guy can help you two position it." Scissor Sisters When everyone's naked, "sit down facing each other, and scoot toward each other until your vulvas meet. Move your body back and forth to rub your clits together", says Cadell. "If you want her closer to you, reach your hand under her butt to pull her lower body into yours." It's inevitable that we will still be awkward turtles... but these are definitely good to know.