There are many advantages in their being accustomed to the use of arms, and no possible disadvantage.
“The juvenile sea squirt wanders through the sea searching for a suitable rock or hunk of coral to cling to and make its home for life. For this task, it has a rudimentary nervous system. When it finds its spot and takes root, it doesn't need its brain anymore so it eats it!”
“I'm quiet, and I don't enjoy watching horror flicks, so am I like Zeke? No way.”