HENNING DALHOFF / SCIENCE PHOTO LIBRARY HENNING DALHOFF / SCIENCE PHOTO LIBRARY
Penis erection. Artwork of the stages in the erection of a penis. The glans is seen at the tip of the penis, which in this circumcised man is not covered by a foreskin. The penis becomes erect by filling with blood and the testicles are pulled towards the body during the excitement phase of sexual intercourse.
Model release not required. Property release not required.