What if it turns out that all sex has unforeseen consequences that human beings are incapable of understanding? A lot of cultures ascribe spiritual and metaphysical values to sex. What if aliens have an empirical proof that sex affects metaphysics in a way too complex for any human mind to conceive of?
Considering that metaphysics must be affected in that way in order for any species that practices copulatory sex to not die out…
(You could make an argument for IVF, but…no.)
Yes, but that’s also the case for animals. Animals don’t understand they’re gonna get pregnant from sex. They still do it. And we avoid doing it with them because they don’t understand it. Maybe aliens will conclude we don’t understand sex either, and only the asshole aliens will be willing to sleep with us.
I think In that scenario that you are describing there is an imbalance in the sexual encounter. I feel that there is a way to approach it in a way that alien explains the consequences, but that would depend highly on what the objective reality of the encounter would entail for the human. (I say human assuming that the human is the one unaware and/or new to the metaphysical experience presented to them by the alien partner.). In a way, I think the human has to agree to accepting unknown consequences.