I really do not consider any of my fantasies to be weird in a negative sense. I actually enjoy the word weird. It makes me think of unique, and interesting things. For the purpose of this question, I am going to talk about a fantasy of mine that is impossible to truly happen.
Human slave jewelry.
I would LOVE to have a shrink ray gun that I could point at any slave of my choosing, and shrink them down nice and small. I would love to wear them on a charm bracelet. Very special weaklings would earn a place on my necklace, or on the straps of my heels/sandals.
I would have so many of them, that the majority would simply be disposable. I would devour them , and crush them beneath my feet, just for fun.