I'm too lazy to put warnings on each one individually, but pretty much all of these are YAOI & BDSM and may contain elements of RAPE/NON-CON, SEX TOYS, URETHRA PLAY, S&M, GANGBANG, TENTACLES etc. A few of them on here can get pretty dark and depraved with abuse, blood, kidnapping and such so read at your discretion.
Not ranked in any particular order, just listed as I found them. Sorry it's REALLY unorganized.