PLEASE FOR THE LOVE OF ALL THAT IS SQUICKY IN THE WORLD CONTINUE!!!!
It is rare to see squicky fics and Harry/Dumbledore fics to go more than a 1-2 chapters, or to find at all. So please, for the all of us googling weird stuff and stuff that will make us look like bad people if you look into out internet history, please continue giving us good content. The last story I read of a similar topic was on AO3 called Naive Harry and Albus Dumbledore by LivingInTheLight (they have an entire series based on and called Naive Harry, where he basically becomes other people's sexual playthings) and that only lasted 2 chapters, though they might do another chapter, I am not really sure. Anyways, I love that you are going to try to write this kind of stuff. I am sick of googling different variations of "dumbledore thrusts into harry" and such, even down to the hardest of the hard core squicks of poop and pee (so happy I changed my penname).
Anyways...
So I post some challenges you might like over in the AFF Community Forum with the same user but as a guest. The 3 you might be interested are titled "Marge's New Pet Bitch: Harry," "Harry Potter: aka The Bitch of Dudley's Gang," and "Vernon's Pet Freak." I also thing there is a shortage of some with Umbridge (come on she had unlimited power in the school and she is JUST going to make them stop kissing and use a little blood quill on them, not likely), Lockhart (he is too arrogant not to), Snape (in which he is extra creepy like Dumbledore here or extra squicky), Dumbledore (see Snape or this fic), Marge (I CAN'T FIND ANY WITH THAT CREEP WTF), Dudley & Vernon (do I really need to explain this one? also it would be more like Dumby here), Petunia too, Voldy (not his usual self, more like Dumby again), Fenrir, Goblins/House Elves/Magical Creatures in general (I do know there was a challenge involving the Goblins and Harry over on hpfanficarchive called "The Goblin's Debt" by slyfer101 and 2 authors have picked it up, yay!). There are probably more that I can't remember, but I just wanted to give you a variety of ideas to work with and to write down and post somewhere all of the rare pairings I want so I can make challenges for them. Sorry if I overloaded you! I'm just a little excited to find an author that willingly puts out there that they will write these types of stories.
Also, because of how you worded your bio I might suggest putting in there if you have any limits to what you might write, like would you write vore or graphic rape that leads to a mental breakdown? It is important to put down with such an open invitation. Hope I helped and not only annoyed you...