Vampire sex, since vampires are cold in most medias, but this specifically refers to twilight vampires.
This phrase originated from a TikTok that was also posted to the “Twilight Shitposting” Facebook group, in which the video referred to the fictional scenario of Edward & Bella pushing Renaldo off them to have the ability to have more “ice relations”.
I wanna have ice relations with a sexy fruity lunatic vampire boy