Bone Up On Facts
The idiom “Make no bones about it,” as in, to speak frankly or accept a thing without objection, has origins in eating, with references back to the 15th century. Finding a bone in your soup or other food obviously slows the process of eating it, and without this hindrance you can eat it without problems.
If you did find a bone in your soup, however, you could throw this bone or some other table scrap to a begging dog to temporarily appease it. This is the origin of “throw (him/her) a bone.”
Despite common slang, the human male’s erection involves no bones, but is a purely hydraulic process driven by blood flow. Many other male mammals, however, achieve erections with a bone called a “baculum,” including gorillas, chimps, bears, wolves, and dogs.