Credit to u/Dalek1234 for this masterpiece.

Fuck it, I’ll share mine. No need for a throwaway, I’ll own this shit. So for me, I really get off to the thought of just how incredibly intimate some things are. Like just the idea that sex means I’m literally inside the other person’s body. And cumming in a girl is just filing her even more with me, my essence, if you will. So naturally the idea of impregnating a girl is got to me. The deeper my cum goes in her the better. Swallowing, cumming in her ass, it’s all great. Then it gets a bit weird. If you’ve dared to browse any hentai/furry stuff you’ve probably seen the “impossible” fetishes, like nipple penetration for example. Or the images where the guys are cumming fucking gallons. These appeal to me for the same reason. Filling her up as deeply as possible. Owning her, making her mine. Then it gets even more crazy. I imagine the nipple fucking, plunging into her chest, and, ignoring how anatomy actually works of course, this allows me to fuck her heart, the very thing that gives her life, and I’m using it for pleasure. And when I cum, it’s pumped through her whole body, making her my property. Surely it can’t get more bizarre than that, you may think. But there is one final step. The heart may keep your alive, but where is your essence? Your personality, the very thing that makes you who you are? The brain of course. Many times, I’ve fantasized about my exs on their knees, somehow perfectly fine despite having a hole in their skull just big enough for me to enter. They scream and beg for me to fuck them in the brain and cum in it, as it is all that they are, and I would permanently make them mine, erasing who they are. It’s pretty fucked, but I’m comfortable knowing my fantasies are literally impossible. Also I never think these things about my girlfriend because I love her too much to think of doing horrible things to her. But she is just as kinky, so we can enjoy the more normal fetishes just fine.