On almost every care sheet I have found it says never hold them unless I really have to. Is this true? There are alot of pictures on the net of ppl holding the frogs and even a few where they let the frog sit out like on a desk for a few. I have never held my frogs at all. But today I was putting new water in and nibbler jumped on to my arm he started to walk up my arm lol. But now I kinda want to hold him in my hand. Would this be safe and if not why?