It's more than mild, but Dolphins aren't as effected, iirc. It's pufferfish which has a toxin that can kill humans. While it's possible to touch and be safe because our skin will block it, small scrapes or accidentally getting it in our mouth or eyes etc could be incredibly dangerous, where as dolphins use their snouts and mouths and seem to get just a bit high.
Edit: also it's in some dispute whether it was intentionally getting high or just accidental poisoning.
Technically something similar already exists in EU. Aing-Tii monks do not see the force as black or white, but as a rainbow. They mostly stayed to themselves except to fuck up some slavers from time to time, but they have taught at least 1 human their method of using the force.