When two people are doing a bit of anal sex (they can be a homosexual or heterosexual couple; we're all friends here), and the penis is inside the bottom, if the person on the 'receiving' end squeezes, can it push the penis out? Would the bum muscles be strong enough to compete against the invading sausage?
Let's also imagine in a seperate scenario that the person on the 'recieving' end is ready to evacuate their bowels during anal sex. If the 'reciever' squeezes while the penis is inside them, would the faeces assist in pushing the penis out in a more powerful manner?