Kadin's always assumed what feels normal; what everyone feels in the same situation. What he feels is a sort of abrupt surge of pleasure the moment someone cums inside him. It comes with a burst of energy, which he also assumes to be normal.

None of it is normal.

For a brief blissful moment, Kadin no longer notices pain. The pleasure recedes and all he feels is the discomfort and pain. A long drawn out groan leaves him. He's left wishing the chains would stop swaying the weight around.