iget,
The penis is half smooth muscle. It's been stated over and over, again and again, in multiple scientific articles. There have been a few articles written solely on the importance of the penis's smooth muscle (such as this article:
http://www.ncbi.nlm.nih.gov/sites/en... pt=Abstract).
I'm not sure who started the myth that the penis isn't a muscle, but I wouldn't doubt it if it was the same guys who started the myth that
penis enlargement isn't possible either. And we know that's not the case
