At some time of penetration, the canine penis isn't erect, and only able to penetrate the female since it includes a slender bone called the baculum, a characteristic of most placental mammals. The corpora cavernosa are enveloped through the tunica albuginea, that is a layer of dense fibroelastic connective tissue. https://felixzbcba.ambien-blog.com/41989139/details-fiction-and-filler-for-younger-brother