We have many methods of studying the interactions between human females and the various creatures that have been discovered on alien worlds. One of the most interesting are the detailed digital recordings of these experiments that allow repeated re-evaluation of them.
These recordings are not only useful for our researchers but their sales help augment our research budget. They have been made available to not only to other human institution but to aliens that find them as interesting as we do. Often they are used in educational wildlife or sexuality programs, for both aliens and humans.
Originally there was some concern about the exposure of the general public to this type of material. However, with our ongoing contact with alien species the once parochial attitudes of the huamn species have been broadened to not only tolerate but accept these things as natural. They have led to a deeper understanding of the human position in the universe of many creatures, both sentient and not, whose natural, or induced, attraction to the body cavities of humans is neither abhorant or strange.
So, we hope you appreciate the interactions between human females and the creatures in our labs. While you observe recordings of these activities remember that many of our test subjects are performing a valuable scientific service as volunteers. Others are paying their debt to our society, or have family members who are subversive and are here as a warning that more than one's own persoanl safety is at risk when one challenges the Imperial state.
Thus, not only are these things natural, they also are noble acts of public service or proper repaymant for one's own and one's family's crimes. We hope that you find that these scenes not only educational, but enlightening, and even beautiful as creature naturally do what is normal for them.