Acrasia doesn't actually have any sexual bits to her, normally a smooth dragon like slime all the way, though she can form theim when necessary.
Acrasia's species reproduces by budding off a part of themselves and coaxing it with magic into a fully formed creature. As such, she doesn't typically engage in sex. A sufficiently determined partner who's won her interest could plunge themselves into her slime, however, or she could form the required bits. It would be a novel experience for her.
Acrasia has a mouth that's very gooey and can stretch to expand around creatures. There are no teeth or hard substances, though she does have a broad tongue. She doesn't need to eat through her mouth, and can instead ooze around a creature as well. As such, internally she is the same color as her purple ooze.
Acrasia doesn't have a stomach per se, but rather when she swallows or envelops food, a little vacuole forms around the meal, where acids and other digestive fluids are secreted directly into it. These can be separate for each food, or can be pushed together and combined into one. Depending on how close it is to the surface, the prey can be seen through her slimy body.
Being slime, she doesn't really have any other organs to her digestive system, absorbing stuff directly through the vacuole when digested. Indigestible stuff is typically expelled out the front or back.
• Mostly Pred
• Willing Pred
• Unwilling Prey
• Digestion
Acrasia is not a typical hunter, and doesn't usually go seek out prey. Occasionally she might slide out during a rainy season to catch some meals, but her slow metabolism means she doesn't need to hunt often. That said, she is certainly not above eating visitors or interlopers in her cave, and those are probably the primary source of her sustenance. She can easily envelop things far larger than her, stretching her slime around them to fit, deforming her figure.
She's not the most appetizing creature, being made mostly of slime, and one would have to take care to not split her apart while consuming her. There's no structure, enabling her to be compacted well into a belly should a pred manage to gulp her down.