5 Feet of Fury

Agreed: ‘I Married a Monster From Outer Space’ (1958) way better than its title suggests

CinemaRetro:

As space invaders go, these guys are fairly lame. They seem reluctant to utilize their abilities to use death rays to reduce their opponents into a pile of ashes.

In fact, they seem to dig their faux human alter-egos especially since they discover that sex can actually be fun, especially with attractive earth girls.

(On their home planet, sex was only for procreation purposes, an understandable policy especially if the women looked like the men.)