I mean, it's just typical guro stuff. Saya no Uta trumps it in the weird factor. There's much worse guro out there, but more than that is the psychological weird fetish shit. I'd give that particular manga a 5/10 in weirdness.
Well honestly I watched 2 girls 1 cup this morning for the first time and I watched the first 2 chapters for this last night and I don't really have the 2 girls weighing on me but the guro one is.