The crew of the Starship Enterprise which you are familiar with from the Star Trek universe, was captained by the Yagondir race. The Yagondir race is capable of reproduction with other people of the terrestrial world. These aliens took over the crew and then gathered all women on the deck of the ship. They then undressed the girls to see what they had in them. Theythen began to seduce beautiful women from behind , much like a stallion protecting a mare during an intercourse.