I don't like people petting or holding Nena or Rufus.
Sometimes people just pet them without asking..I get furious and tell them not to do it again.
If they ask, I may let them pet them on the head and that's it. Nena loves it more than Rufus (Rufus starts jumping and biting if he's not ion the mood). And I always put them together, that way Rufus annoys the person and they stop fasted
I would never let anyone hold them (anyone that I don't know)