Diamond: seated partner, receiving partner lying back with legs on one shoulder
The Diamond is a penetration position in which the penetrating partner sits upright and the receiving partner lies on their back at a right angle to them. The penetrating partner sits on the floor or bed with one knee raised and the other leg stretched out; the receiving partner lies along that outstretched leg with the pelvis against the partner's groin, thighs drawn to the chest and both legs together resting over one of the partner's shoulders. It allows medium-depth vaginal or anal penetration, with the seated partner setting the rhythm and the two of you able to look at each other.
Also known as: Diamond position
Anatomy and biomechanics
The penetrating partner sits upright on a firm surface, with one leg bent and the knee raised and the other leg stretched out straight. The receiving partner lies on their back along that outstretched leg, head pointing away, and slides the pelvis up against the partner's groin. They bring the thighs close to the chest and rest both legs, kept together, over one of the partner's shoulders, so the feet end up in the air behind them. Their hands can rest on their own chest or hold their thighs. The seated partner controls the rhythm with small movements of the pelvis and can steady the receiving partner's legs or touch their chest with the free hand. Penetration is of medium depth; the closed legs make the fit feel tighter. The receiving partner needs some hip flexibility, and the thighs press against the abdomen.
Why this position works
Some couples like it because it is restful for the receiving partner, who simply lies back while the seated partner does the moving, and because the closed legs create a snug feeling that some people find very pleasant. The two of you can see each other's faces, and the seated partner has a hand free to caress. It is also an easy position to switch into from other seated or lying positions. Sensations vary from person to person.
Variations of this position
Variation 1: one leg on each shoulder
Same position, but the receiving partner rests one leg on each of the seated partner's shoulders instead of both on the same side.
The seated partner and the right angle between the bodies stay the same. Opening the legs and placing one on each shoulder releases the pressure on the abdomen and the twist in the hips, so it is easier for less flexible people. The fit feels less snug and the seated partner can reach the receiving partner's genitals with a hand.
- Start in the basic position, with the receiving partner lying along the outstretched leg.
- The receiving partner separates the legs.
- Rest one leg on each of the seated partner's shoulders.
- The seated partner moves with short, gentle movements of the pelvis.
Variation 2: with a cushion under the receiving partner's pelvis
Same position, with a firm cushion under the receiving partner's lower back and pelvis.
The legs stay together over one shoulder. The cushion lifts the pelvis to the height of the seated partner's groin, so neither has to shift to line up, and slightly changes the angle of entry. It also takes some load off the receiving partner's lower back.
- Place a firm cushion where the receiving partner's pelvis will rest.
- The receiving partner lies back with the pelvis on the cushion, against the seated partner's groin.
- Bring the thighs toward the chest and rest both legs over one shoulder.
- Check that the angle is comfortable before starting to move.
Variation 3: the seated partner leans against the headboard
Same position, with the seated partner resting the back against the headboard or a wall.
The receiving partner's position does not change. With the back supported, the seated partner no longer has to hold the torso upright, so the position can last longer, and both hands are free to hold the legs or caress. The movement becomes shorter, mainly from the hips.
- The penetrating partner sits with the back against the headboard or a wall, one leg stretched out.
- The receiving partner lies along that leg with the pelvis against the partner's groin.
- Rest both legs together over one shoulder.
- The seated partner moves with small hip movements, using the hands to steady the legs.
✓ Tips
- Raise the legs only as far as the receiving partner's hip flexibility allows; the knees can stay slightly bent.
- If the thighs press uncomfortably on the abdomen, lower the legs a little or move the pelvis slightly away.
- A cushion under the receiving partner's head and shoulders makes it more comfortable to hold.
- The seated partner should move gently: with the legs closed the fit is snug, and short movements are more comfortable.
- For anal sex, use plenty of lubricant and a condom, go slowly and stop if there is pain.
- Use a condom to protect against STIs and, in vaginal sex, against pregnancy.
Key facts
- Interaction type
- Vaginal or anal penetration, penetrating partner seated and receiving partner lying at a right angle
- Active anatomy
- Penis
- Receptive anatomy
- Vagina or anus
- Main stimulation
- Vagina or anus (medium-depth penetration with the legs closed)
- Setups and participants
- Couple · 2 people Hetero
Frequently asked questions
Is the Diamond suitable for beginners?
Yes, as long as the receiving partner has reasonable hip flexibility. The effort is low for both of you; the main thing is to find a comfortable leg position.
Who controls the rhythm?
Mainly the seated partner, with small pelvic movements. The receiving partner can guide depth by bringing the thighs closer to or further from the chest.
Can it be done with anal sex?
Yes. Use plenty of lubricant and a condom, start slowly and stop if there is any pain.
Is it suitable during pregnancy?
It is better to avoid it: the thighs are drawn up against the abdomen. Positions without pressure on the belly are more appropriate.
Safety and evidence
Scientific context for common terms used on this page. Keeping these terms makes the content easier to understand; the sources clarify what is established and what remains uncertain.
G-spot: what the evidence says
“G-spot” is a widely used term for a sensitive area of the anterior vaginal wall. Scientific literature has not established a discrete anatomical structure with an agreed location, size and nature; sensitivity and response can vary between individuals.
A-spot / AFE zone: limited evidence
The “A-spot” or AFE zone has been proposed to describe a deeper area of the anterior vaginal wall. Available evidence is limited and does not support presenting it as a confirmed anatomical structure.
Reviewed by the editorial team ·
Related sex positions
The Lock
Seated position, with vertical contact and A-spot, G-spot stimulation.
Right Angle Meeting
The penetrating partner sits with legs extended; the receiving partner lies on their back with the pelvis on their…
Seated Face to Face, Leaning Back on Hands
Seated position, with vertical contact and A-spot, G-spot stimulation.
The Union of the Heavens
Seated position, with vertical contact and A-spot, G-spot stimulation.
The Hitch
In an armchair: the penetrating partner sits, and the receiving partner lies on her back across his lap at a right…
Deeply Embracing
Seated position, with vertical contact and deep point, G-spot stimulation.
Launch Pad
She lies on her back with her hips raised on his thighs and her legs pulled up together; he kneels upright and…
The Golden Cradle
Ergonomic posture with stimulation at points A and G.
Bear Hug
Posterior penetration position with stimulation of the G-spot and A-spot.
Reverse Cowboy
Rear penetration position with stimulation of the G spot and A point.
The Crab
Rear-entry position close to the floor: the receiving partner lies chest-down on the forearms with one knee bent, and…
Captivity
She lies on her back with her head hanging over the edge of the bed and her knees bent; he sits upright on the bed…