SOME gymgoers are tortoises.

[W]hen adults with mild mental retardation are allowed to express their sexuality in appropriate ways, they are, in general, competent in terms of biological capability, sexual desire, and the psychological significance they attribute to sexual behavior[…]. However, they typically lack basic information about sexuality that would enhance their ability to engage in intimate relationships, as well as help them to be aware of the implications of that behavior and to protect themselves from exploitation.

I'm distressed that John hasn't answered my calls. I hope nothing bad happened to him on the way here.

The river bank had been eaten away over the years by the flood water.