Comment by 0xbadcafebee

The situation is pretty clear when you're a woman who got cancer from her boyfriend who knew he had HPV and didn't tell her, or didn't get vaccinated because he didn't feel like it. I think most people would want to avoid that situation. The genital warts thing is just embarrassing but another good-enough reason to get vaccinated early.

On Permanence: 10-20% of HPV infections either don't go away, or go dormant and recur throughout your lifetime. These strains are the ones likely to cause cancer. Low-risk ones cause genital warts that continue causing warts throughout your lifetime. High-risk ones may cause cancer.

The vaccine is available up until 45 years old. Worst case it does nothing, best case it prevents genital warts and cancer.