So please don’t get it regardless of age. Its not really considered effective for women who have been sexually active for some time.
Which is why its only recommended for girls, not women.
https://www.ssi.dk/vaccinationer/boernevaccination/vaccinati....
Tldr; Dont rush to get a vaccine that is probably not effective for you. Make an appointment with your doctor and discuss it with her first.
I dont see any reason not to take if you get it for free and you are planning to be sexually active with multiple different partners.
My doctors have generally refused vaccinating me for years (Male/43yo), but finally a new (female) doctor told me it's a good idea. I'm not in a risk group, so I have to pay for the vaccine: Gardasil 9, 3 doses, 3 months away of each other, ~€200 each, although studies say that 2 doses might be enough.
In reality, you can pay to a private doctor so they write you a prescription, but I feel more validated if my doctor says it's OK :)
From top of my layperson head: bruised insertion sites, tainted needles, tainted vaccine supply, customer capacity crowding for the pharmacy, squeezing supply capacity for actual target demographics, etc etc etc.
Things have tradeoffs, even if they are subtle. Relentless follow-through on marginal protocols should generally be treated with suspicion.
Stranger danger advocates brush off the criticism that most abductions occur among family with the "if there's a small chance it would make a difference" argument, but this ignores the real harms of teaching children to fear everyone by default.
if e.g. they are in trouble, then you don't want them to be afraid of strangers and not ask for help from the 99% of the people who would be happy to help them.