Fist Chute: Lower Digestive Tract
Knowledge of basic lower digestive tract helps Tops and Bottoms experience safer and more sensual fisting communion. In fisting circles, this area is referred to as the fist chute.

the branch of anatomy that deals with the structure of organs and tissues that are visible to the naked eye
The following components are discussed in this article:
- Anus
- Rectum
- Sigmoid Colon (Pelvic and Iliac)
- Descending Colon
- Transverse Colon
Anus

Reference Notes | |
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Length: | 2 inches / 4-5 cm |
Components: | anal orifice, anal sphincter (first ring), anal canal |
Related Jargon: | hole, fuckhole, punchhole, mancunt, first ring |
Anatomical Details and Roadmap
The anal orifice, the anal sphincter, and the anal canal are the three major components of the anus and are gatekeepers of the fist chute. The cell make-up of the anus gradually shifts from touch sensitive skin at the orifice (which provides most of the pleasure when fucking) to pressure sensitive intestinal tissue on far side of the anal sphincter (which provides most of the pleasure when fisting).
With anal sex, guys often talk about how tight a hole is based on the anal sphincter, which lies about an inch or so into the anal canal. Textbooks usually refer to two sphincters in the anal canal, but for fisting purposes, you may only feel one ring because the two sphincters are millimeters apart†. It is important to note that inside a fist chute, individual anatomies can differ. In less established fisters, you may be able to feel both sphincters. This small distinction diminishes over time.
With some training, the Bottom can relax the ring on command to allow a fist to pass.
† For the purposes of this website, both sphincters in the anal canal are referred to as the first ring.
- With the exception of prolapseProlapse (n), there are no documented cases or studies that state fisting causes incontinence later in life.
a condition where the rectum slips out of the body, exposing the dark red tissue of the lower GI tract - Massaging the orifice (including rimming) triggers a physiological response that opens the first ring and entry into the rectum.
- Ask the Bottom how much 'first ring stimulation' he prefers prior to starting a session. Some holes need a lot of foreplay to open up; while other holes are agitated with prolonged play. Failing to ask can make the Bottom feel violated or bored—depending upon the needs of his hole.
Fisting Notes Regarding the Anus
Rectum

Reference Notes | |
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Length: | 5-12 inches / 10-30 cm |
Components: | rectum, puborectalis muscle (second ring) |
Related Jargon: | second ring, rosebud, garage |
Anatomical Details and Roadmap
The opposite side of the first ring marks the beginning of the rectum, which can vary in size from person to person. In most people, the rectum is about 5-7 inches (13-18 cm) long. In extreme/established fisters, the rectum can be stretched to 12-15 inches (30-38 cm).
The rectal walls contain sensory nerves that monitor pressure and trigger physiological responses the adjoining components of the fist chute:
- Relaxation of the first ring and muscles attached to anal canal (this response normally aids in defecation)
- Relaxation of the second ring and reverse peristalsis (this response normally dissipates or pauses the need to defecate by retracting rectal contents back into the sigmoid)
a position inside a Bottom that does not trigger any expulsion response, thus allowing him to rest and recalibrate
The rectum is held in place by the puborectalis muscle that separates the colon from the rectum. This muscle is referred to as the second ring. This muscle typically lays near the top of the sacrum (see Fisting Anatomy: Sacrum) and marks the end of the rectum.
- With novice Bottoms, the extra space inside the rectum allows a Top to curl his hand into a fist; however, further depth exploration usually requires the hand remain in the duck-billed position.
- The prostate gland can be massaged through the rectum wall, increasing fisting pleasure in certain Bottoms. Tops should either ask directly OR monitor the body language of the Bottom to determine if prostate massage is pleasurable.
- During a colonoscopy, physicians inflate the rectum and sigmiod with air; some men can do this through ingesting air through a gaping hole, or by pumping air into the rectum via a douche bulb or catheter. The expanded rectum becomes cavernous and easy to navigate. This state is often referred to as 'being really open'.
Fisting Notes Regarding the Rectum
Sigmoid Colon

Reference Notes | |
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Length: | 16 inches / 40 cm |
Components: | pelvic and iliac colons |
Related Jargon: | s-curve |
Anatomical Details and Roadmap
Passage into the sigmoid involves moving through the second ring, which is easily recognizable based on tissue density and elasticity. A related landmark that a Top may experience while passing into the sigmoid is the pelvic inlet (see Fisting Anatomy: Coxal); however, with many depth Bottoms the rectum stretches past/through this opening so that the entrance to the sigmoid is found deeper in the abdomen.
In some diagrams, the sigmoid is pictured as the pelvic and iliac colons, with an extensive set of curves (typically called the S curve) that rest in the concave portion of the pelvic bone. A Bottom can manipulate the S curve to straighten it with extensive toy play and repeated practice sessions with firmer toys.
- The second ring can be a hurdle to depth play if the Bottom is positioned incorrectly and the angle of entry is skewed. Many experienced Bottoms have preferred positions (sling, knees, or bed) that facilitate passing through the ring.
- There are two anatomical configurations with depth fisting. The first involves a stretched rectum as noted previously—a Top can be elbow deep before he even reaches the sigmoid. The second involves entering the sigmoid with the full fist prior to reaching mid forearm—this allows for high bicep and pit depths.
Fisting Notes Regarding the Sigmoid Colon
Descending Colon

Reference Notes | |
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Length: | 10 inches / 22 cm |
Components: | descending colon |
Related Jargon: | none |
Anatomical Details and Roadmap
If one makes it through the 16 inches (40 cm) of the sigmoid, it's a relatively straight shot through up the descending colon to the transverse colon. The descending is less elastic and narrower by design than other parts of the colon due to the nature of gravity pulling chyme from the transverse to the sigmoid.
- Rapid movement at post elbow depths can present a danger to Bottoms; the Top should proceed with caution.
- Passing into the upper sigmoid and descending colon may require the Top to reposition himself at awkward angles based on the Bottom's anatomy. Staying parallel with the fist chute is crucial—dropping the entry angle just a few milimeters can make the difference of several inches in depth.
- It is incorrect to assume that all elbow-depth bottoms are experiencing a hand inside the descending colon. Remember the elasticity of the sigmoid and rectum allows them to swallow the entire arm.
Fisting Notes Regarding the Descending Colon
Transverse Colon

Reference Notes | |
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Length: | 18 inches / 46 cm |
Components: | Transverse colon, splenic flexure (third ring) |
Related Jargon: | third ring, grand ballroom |
Anatomical Details and Roadmap
The last ring encountered in depth fisting is at the ninety degree angle between the descending and transverse colons. The technical name for this ring is the splenic flexure. Practice allows the transverse colon to straighten out, allowing the post elbow-depth arm to move past the stomach and towards the heart. The diaphragm will prevent a Top from directly touching the lungs or heart.
- To gain access, you may have to insert a finger into the splenic flexure and pull it down before inserting additional fingers and full fist.
- Even though this area is sometimes referred to as the Grand Ballroom, movement should be gradual, slow, and graceful (with most Bottoms).
Fisting Notes Regarding the Transverse Colon