Caves in the jungle are weird. Some of them have carnivores plants that have evolved to lure unsuspecting humans who seek shelter in.

The juices that run from their breast into their pitcher are warm and fill the air with a sweetly arousing scent. Once they have lured their unsuspecting prey in, they need only wait as they also have a secondary affect when absorbed through the skin that puts creatures into a trancelike state of bliss. They never feel themselves start to dissolve, and would never want to leave when they feel so blissful.