I found a strange thing concerning the cactus. One of my master scientist as well as adept in healing went to eat. Straight from worktable to cactus.
I sort of panicked at the sight (don't ask me why) and picked up the guy and dropped him in the food bin. After awhile he again walked to the cactus, and when I clicked him his action was 'Curious about the ROCK!' Is it because he maxed his experience level in science? So he tends to be attracted by the cactus, which he's secondly good at? Hmm...
Ah, and one more thing: While it's not strange, I'll never get used to the sight of a bald 2-year-old making cooing noise when I pick him up. Yuck.