The Holy Bible says that God created Eve out of Adam's rib, and hence every male lacks a rib bone. There are people reasoned that subsequently a woman must join with a man in marriage, just as the rib returns to its place in the torso to form a perfectly symmetrical torso.
Medical practitioners certainly do not think so. All men possess a complete set of torso, no bone missing. But yes, a man should've had 207 bones, but instead we have 206. (Oh so the story is true afterall!?)
Well, it depends on how you interpret the rest of this article.
Most mammals (including common species such as dogs and mice) and most other primates (excepting spider monkeys) have a penile bone. A penile bone is a significant bone (unlike our disappearing tailbone, the coccyx), used to help male mammals in obtaining erections during mating. In laymen word, it's a bone for penis. And it's huge. The penile bone of a large dog can be 10 cm long x 1.3 cm wide x 1 cm thick...
The bone is called bacalum. Human bacula have been reported, usually in association with other congenital diseases or penile abnormalities.
With all that explanation, I think God probably removed Adam’s penile bone instead of his rib bone to make Eve. That would explain why human males, of all the primates and most other mammals, did not have one.
In the human penis and scrotum, the edges of the urogenital folds come together over the urogenital sinus (urethral groove) to form a seam, the raphé. If this seam does not form, hypospadias of the glans, penis, and scrotum can result.-blogs.discovermagazine.com
The raphé, as we can see, was “explained” by the story of the closing of Adam’s flesh. Again, the wound associated with the generation of Eve is connected to Adam’s penis and not his rib.
So, human males do lack a bone afterall. But it's not a rib bone.