Yes, the Amoeba loves the Stone, and can conform and stretch to all kinds of shapes to accommodate the Stone. Since the Stone can get it's needs met by just being a Stone, the Stone may entertain fantasies about how much better it is to be inflexible, but this is an illusion.

The Amoeba, oft tired of the wishy-washy flexibility of other amoebas, may feel secure that the Stone can always be trusted to be a Stone.

But one day the Amoeba is likely to meet Gumby, and realize that somewhere between being an Amoeba and a Stone is creature that can do a good stone impression when needed but still relate to shape shifting.

If the Stone doesn't learn to bend a little, Gumby's gonna ride that Amoeba like Pokey.