Speaking at each other??s eyes,, synchronizing your breathing, deep, passionate sex can be exciting. But what if you really want to go deep? You know, in exploring space, no penis, no artificial penis or bandage has disappeared? Well, it's also very annoying.

Some gender positions are better suited to that serious infiltration. When you are in a good mood, try these popular actions.

Flatiron

How to: Lie facedown, with your hips slightly elevated (try sticking a pillow underneath them), and spread your legs out straight. Have your partner penetrate you from behind.

Why it works: The lifted hips offer a low barrier to entry, says New York City sex therapist, Ian Kerner, Ph.D., author of She Comes First. Plus, this one gives great G-spot stimulation, says Kerner.

Face-off

How to: While your partner is sitting down on a chair or the edge of a bed, you sit in their lap, facing them.

Why it works: Because the legs are wider here, you??re more open to receiving all your partner has to offer, Kerner says. This one is also great because you??re able to control pace and just how deep you want to go. Plus, this position keeps your hands free to wander all over your partner's body (or your own).

Cowgirl

How to: Have your partner lie down, and you climb on top. Push off your partner's chest or the bed to control your movement.

Why it works: From this position, says Kerner, you can open your legs wider for a deeper entrance. This move also provides ample G-spot action.

Cowgirl's Helper

How to: Like classic cowgirl position, you??re on top as your partner lies back, and you push off their body for leverage. The twist here is that your partner assists. By holding your hips or thighs, he supports your weight and rises to meet your movements.

Why it works: This gives you some great G-spot stimulation, and you can go as deep as you like depending on your thrusts, says Kerner. Plus, you get the chance to dominate.

Missionary

How to: Lie back while your partner lies on top of you, face to face.

Why it works It??s a classic for a reason??this one gives you deep stimulation, combined with intimacy, says Kerner. (Hello, prime making-out position!) To take it to the next level, raise your legs over your partner's shoulders.

Doggy

How to: Get on your hands and knees while your partner kneels directly behind you and enters you from behind.

Why it works: The angle of this position allows for deep penetration and G-spot stimulation, says Kerner. Plus, your partner's hands are free to stimulate your clitoris or engage in a little nipple action, he says.

The Caboose

How to: Your partner is seated, and you back into their lap, facing away.

Wh it works: Since this probably isn't your go-to position, it??ll feel like a whole new world down there, says Kerner. That newness will make the penetration feel even deeper than it actually is. Plus, not being able to see your partner can be incredibly sexy.

Scoop Me Up

How to: Lie side-by-side in the spooning position, and bend your knees slightly so that your partner can enter you from behind.

Why it works: Your partner has more leverage and support in this position, so they can move their body in a way that gives maximum depth, says Kerner. Plus, your partner can easily wrap a hand around and stimulate your clit while thrusting. This one is also perfect for when you??re both tired but still in the mood.

Seashell

How to: Lie on your back with legs raised up and out. Get your ankles as far back toward your head as you can. Then, your partner enters you in missionary style.

Why it works: Your legs are spread wide, lending more depth, says Kerner. Plus, from this position, your partner's pelvis will give you some clitoral stimulation??or you??re free to take that into your own hands.