7. THE FLY II (1989)
You may recall that at the end of the 1986 original, Geena Davis is knocked up with Jeff Goldblum's part-fly spawn. Here, Mom dies after delivering the gooey larva that grows up to become...Eric Stoltz. Stoltz plays a brainiac kept in a lab where he beds Daphne Zuniga before mutating. When he reveals his secret to her, she's incredibly understanding for a woman who just had sex with a fly. Which pretty much makes her the real hero of the film.