Examples of Martian Tech

Martians don't have normal weapons to use against humans. They aren't looking to kill or take over the world and they can easily blend in so humans are not much threat to them. They do have weapons that will quickly convert humans to breeders, but prefer not to use them since they have more fun doing themselves and get amusement their more subtle tools. Due to the random nature of their deployment, humans aren't sure which of these are mere rumors and which are true threats.

Cock rings: Supposed to let a man fuck like a Martian. The cockrings adjust the wearer's body so they're more attractive and will similarly improve the wearer's partner. Message boards have plenty of comments about the awesome sex people were having with the rings and how easy it was to pickup chicks. There were a few threads about starting to look feminine, even one saying they'd fully turned into a woman, but they were being downvoted and mocked for spreading rumors.

Panties: Men and women wake up and find themselves wearing a fleshy pair of panties they cannot take off. While not common, these are fairly widespread so medical professions are familiar with them. These skip subtlety and focus on getting the wearer off with each orgasm transforming the wearer's body to be the perfect breeder. These can theoretically be removed if the wearer resists the pleasure, but any transformation that has taken place cannot be reverted at this time.

Womb Tattoos: There's some argument if these should count as tech, but what else do you call tattoos that spread like a virus? Maybe they're infertile. Maybe they're just honey pots. Either way, the Martians send some of their tattooed converts out hunting for men. If a man is foolish enough to cum in one, they'll find themselves sporting their own womb tattoo. At that point, there's no going back. Each orgasm they have will drive them closer to womanhood.