So sometimes I like to polish my nails, and/or grow them out. A few nights ago, I did my nails for the first time since getting Samantha. Ever since then, most of the times I've held her, she has tried to gnaw at my nails! I'm really not comfortable with her spending the holding session trying to bite my nails. So far, I haven't let her really get her teeth on my nails, but she's been trying and I'm not sure how far she'd go or whether she'd actually bite hard. She will also occasionally try to gnaw on fingernails if they're long, but the polish, it seems, has really gotten her attention. Is this a common thing for rats? Is there a good way to discourage this (like the gentle bopping that we have used to try to discourage our others from nipping), or will I just have to give up the fancy nails or get used to this?