They are not familiar with our customs. They don't understand that after they hear the noise they should stop.They will keep pulling until your finger comes right off your hand.
And that will just result in a smelly and bloody mess for everyone.

They love playing games with them...
There are even a few new robot day care programs opening up...
But you know, as good as robots are with our chilren, it's ironic because humans aren't aren't nearly as good with robot children.