After swallowing, food travels down the oesophagus to the stomach – a ‘J’ shaped organ about 30cm long – where it stays for up to 6 hours. Here, acids and enzymes digest food until it becomes a semi-liquid soup which you have probably seen as vomit (with diced carrots).
The speed at which food moves on from the stomach depends on what you’ve eaten and what’s going on further down the line. Nerves which connect the arse to the stomach transmit messages to control the flow of food and waste. For example, you may experience discomfort or pains in your stomach if you are constipated or being fucked or fisted. Conversely, when you eat, you often want to go for a shit.
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