(OP) oh my god I'm so happy right now. Either option is absolutely perfect, so whichever strikes your fancy more! (This greedy trash hoarder wouldn't mind reading one as a fill to the other prompt and another here, but I will keep to my pile of rotting seafood)

As for bonuses, with tentacles especially, I'd kind of like Bucky being filled well beyond what any human should be. Multiple tentacles in each end going much farther than they should. I would also not be opposed to some sounding just to make sure we've got our holes covered. Being stuffed full of cum or slime also does wonders for my libido.