The symptom that suggests human papillomavirus (HPV) infection in males is:

Rationale: A. Testicular swelling is not a typical sign of HPV infection; it may indicate other conditions such as epididymitis or hydrocele. B. Penile warts are the hallmark symptom of HPV infection in males. They can appear as small, flesh-colored or gray growths on the penis, scrotum, or surrounding areas and are often painless. C. Testicular pain is not a common manifestation of HPV and usually suggests other urologic conditions. D. Erectile dysfunction is unrelated to HPV infection and is influenced by psychological, vascular, or hormonal factors rather than viral infection.