Because the natural ecology of tentacle plants involves pleasuring captured prey and sipping energy, they are intimately familiar with all the erogenous zones of the human body from birth. All sorts of bodily fluids, everything from tentacle slime to a woman's saliva and love juice, function as aphrodisiac fluids that heighten their prey's sexual feelings and cause sexual excitement. Despite being organisms that specialize in providing pleasure like this and milking spirit energy, they're warm, and they have a surprisingly amiable disposition towards people.