Congenital or acquired anatomical abnormalities of the penis may interfere with cohabitation and normal deposition of semen. These congenital anatomical variations especially include abnormal position of the urethral meatus (hypospadias/epispadias), but also, penile deviations due to induratio penis plastica (IPP; Peyronie's disease) which represents the most common clinical problem. © 2010 Springer-Verlag Berlin Heidelberg.
Van Ahlen, H., & Kliesch, S. (2010). Disorders of erection, cohabitation, and ejaculation. In Andrology: Male Reproductive Health and Dysfunction (pp. 279–321). Springer Berlin Heidelberg. https://doi.org/10.1007/978-3-540-78355-8_16