To make my own general question, how does the SECRETION tag work exactly? Does the chosen secretion simply stay on the part which secretes it? Or does the secretion get on other parts of the creature's body? Like, say, if I make a creature that secretes a form of toxin or venom continuously from its mouth, will said toxin also be on parts which are arranged around the mouth part? Will it just remain there in the mouth, or will it drip down onto the ground?
If it secretes from a part, aka the mouth, and mainly the chosen tissues of said mouth. It will remain there. It won't drip from the mouth to the ground, it can however be washed off the mouth from the rain, or when going into water (washes off into the water)
Please don't just repeat your question over and over. People have tried to help.
Can slow learner be milked or not? You are developer, you must know.
I'm going to go with "no" at least in game, WHY? Because they are not properly slated as PET or PET_EXOTIC which is a very, very, important flag regarding animal/livestock interactions (farmers workshop, pastures, etc) if you want Ogresses to be milkable (which btw you have added the right stuff to the caste) you need to also slap on PET_EXOTIC or PET in that caste as well (you can omit it from the main creature and MALE if you wish. making FEMALE the only pet version)
If that still fails then I'm not sure how I can help, or anyone for that matter. To be Honest no one has tried to setup, and use milk-able, non-pet creatures before.