Chloroform the bitch until he's under your control, or nearing death. You must kidnap him at his horniest because, even if there's no food, water, oxygen etc, a man can survive if he gets given a juicy BJ.
Drag the unconscious slab of meat across the pavement. If it's concrete the victim may experience some internal bleeding. You can choose whether to collect and save some of the blood for later (if you have that kind of kinky fetish) or act like you're a transvestite on your period without any tampons.
If any dumb bitches question your motives, reply with: "We're just practising for Halloween in July", "This is normal", "Everyone just LOVES dead sex" and end each line with a hearty laugh that should break any tension created.
At this stage, you should be finished with the human artefact and dispose of it carelessly in front of his ex-girlfriend (or soon-to-be).
Repeat process until the ex-girlfriend (or soon-to-be) turns lesbian.
Yeah, I have no ****ing clue either
