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Physical effort: Medium Posterior

Anal train: group anal sex position in a kneeling line

The anal train is a group position for three or more people. Everyone faces the same direction in a line: the person at the front is on all fours and only receives, those in the middle kneel and both receive and penetrate, and the person at the back only penetrates. Every participant except the one at the front needs a penis or a strap-on. It is not physically extreme, but it requires a lot of coordination, communication and care with hygiene and protection.

Also known as: Gay train

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Illustration of Anal train: Group anal position: three or more people kneel in a line facing the same way, and each one penetrates the person in front.
Anatomy and biomechanics

The person at the front gets on all fours, with hands and knees on the bed or a padded floor and knees apart. The next person kneels upright behind them, holds their hips and penetrates them anally; at the same time, the person behind kneels, holds the middle person's hips and penetrates them. With three people there is one in each role; with more, extra people join in the middle. Everyone faces the same way, so there is no eye contact or kissing, and body contact is limited to hips, thighs and hands. The pace is shared, but the person at the back sets it most, because each push travels along the line: slow, small movements keep everyone in sync. The main load falls on everyone's knees and on the wrists of the person at the front.

Why this position works

For people who enjoy group sex, the anal train can be a playful, shared experience: everyone is connected at the same time, and those in the middle can feel giving and receiving at once. For participants with a prostate, receiving may stimulate it, although this varies from person to person. Its appeal lies mainly in the novelty and the complicity of the group; it is not a position for close, face-to-face intimacy.

Difficult Penis-Anus Configuration

Variations of this position

Variation 1: front person lying on a cushion

The person at the front lies face down with a cushion under the hips instead of staying on all fours.

Lying down takes the load off the front person's wrists and knees; the cushion raises the hips so the next person can still kneel behind them.

  1. The person at the front lies face down and places a firm cushion under their hips.
  2. The middle person kneels between their legs and penetrates them slowly.
  3. The person at the back kneels behind the middle person and joins in once everyone is stable.
  4. Keep movements small, as the person lying down cannot absorb much push.

Variation 2: at the edge of the bed

The person at the front kneels on all fours at the edge of the bed, and the others stand on the floor behind them.

Standing on the floor spares the knees of the people behind, but it needs similar heights and a firm, non-slip floor to stay stable.

  1. The person at the front gets on all fours at the edge of a firm bed.
  2. The middle person stands on the floor behind them, feet apart, and holds their hips.
  3. The person at the back stands behind the middle person, feet apart.
  4. Move slowly and stop at once if anyone loses balance.

Variation 3: with four or more people

More people join the middle of the line, each kneeling behind the next.

Each extra person adds a middle position that both receives and penetrates. The line is harder to synchronise, so movements must be even smaller.

  1. Start with the person at the front on all fours.
  2. Each new person kneels behind the previous one and joins in only when stable.
  3. The person at the back sets a very slow pace.
  4. Agree on a signal so that anyone can stop the whole line.

✓ Tips
  • Agree beforehand on limits, roles and a clear word to stop, and make sure everyone keeps consenting throughout.
  • Use plenty of water- or silicone-based lubricant for each person who receives, and add more whenever needed.
  • Use a new condom for each person and never move from one anus to another without changing it.
  • Enter one at a time and slowly, after relaxing and preparing the anus; stop if anyone feels pain.
  • The person at the back should keep pushes small and slow: a hard thrust travels along the line and can bend a penis or throw someone off balance.
  • Pad the floor or use a firm bed to protect knees and wrists, and take breaks.
Interaction type
Serial anal penetration in a kneeling line
Active anatomy
Penis (or strap-on) of everyone except the person at the front
Receptive anatomy
Anus and rectum of everyone except the person at the back
Main stimulation
Anal penetration in series
Setups and participants
· 4 people In group

Frequently asked questions

How many people does the anal train need?

At least three: one at the front who receives, one in the middle who receives and penetrates, and one at the back who penetrates. More people can join in the middle, but the longer the line, the harder it is to coordinate.

Does everyone need a penis?

Everyone except the person at the front, since each person penetrates the one ahead. A strap-on can be used instead of a penis.

How can we reduce the risk of STIs?

Use a new condom for each partner, do not share toys without cleaning them and covering them with a fresh condom, and consider regular testing. In group sex these measures matter even more.

Is previous experience with anal sex needed?

It is strongly advisable. Each person who receives should already know what feels comfortable for them, and it helps to have practised as a couple before trying it in a group.

Reviewed by the editorial team ·

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