Xenosexual

1 : of, relating to, or characterized by a tendency to direct sexual desire toward extraterrestrials or alien species

2 : of, relating to, or involving sexual intercourse with an extraterrestrial or alien

3 : a person that has sex with extraterrestrials or aliens

Person 1: Am I the only one that thinks Xenomorphs are hot?
Person 2: You're just a xenosexual.