heck
Once you're 18+ in most countries, age matters very little.
There are only strict arbitrary rules for those under 18 because those under 18 are more easily influenced and malleable as compared to those who are 18+.
It's a way to grant protection to those who think they don't want it, unless they can handle it, but that's a big if, and there are always that single special charismatic male, usually, that is actually a huge psychopathic creep.
Heard of many close friends who are below 18 falling for their fricking machinations.