My breads look fine but compress really easily and turns into dough

Toast

 I can't describe it...my breads all look fine structurally, but when they are touched they compress very easily and seem doughey. Why does this happen? I bake all my breads until they're at the correct internal temperature but it still happens. Thanks everyone!

Or after they reach room temperature?  

If the former, let them cool completely before slicing. If the latter, check your thermometer. It sounds as though the bread isn't completely baked. 

Paul