Yes, the penis can fracture when it is erect and subjected to significant force. This usually happens during vigorous sexual intercourse or masturbation, or due to improper positioning.
When the penis is erect, it is filled with blood. If an erect penis is suddenly bent or subjected to significant force, the corpus cavernosum can tear, leading to a penile fracture. The corpus cavernosum is erectile tissue, surrounded by a tough tunica albuginea and composed of connective tissue and smooth muscle.
A penile fracture is quite painful and often accompanied by a popping sound, followed by bruising. In some cases, the nearby urethra may also be damaged, leading to blood oozing from the urethral opening.
Penile fractures require emergency medical treatment. If not treated promptly, it can result in penile deformity or erectile dysfunction.