The crew of the starship Enterprise that you recognize from the Star Trek universe, was taken captive by the Yagondir race. These are strange humanoids that breed only with individuals who are of terrestrial origin. These aliens took over the crew and gathered all women on the deck of the ship. They then stripped them of their clothes to find out what they would have with them. They began to seduce gorgeous women by snatching them from behind as if a stallion was protecting a mare during an intercourse.