So I have PCOS (look it up if curious) which messes with a ton of things, including periods. I could go for months without having one, or have two within three weeks, and they always involved cascades of blood and discomfort.
Then my doctor told me to start birth control and my periods have been polite agreeable little things ever since. That is, if I have the one week break every months. If I skip a break I will be punished with a worse period than usual, but still nothing as bad as before.
So that is why I started on birth control pills. Nothing to do with shagging, but I and other Danes have noticed that people outside of Denmark tends to just assume that's the only reason why you'd ever take the pills. I have asexual Danish friends who have never been questioned as to why they're on birth control inside Denmark, but outside people will ask "But you don't want to have sex, so why are you afraid of pregnancy?"
Besides probably being a case of better informing the general public, it probably also comes down to birth control pills being called "P pills" in Danish (P not standing for "pregnant", because our word for that is "gravid") so you don't automatically relate it to danger of babies.
I first got my period when I was 11 and for the first few years it was awful. My mom was afraid to have me get put on meds because she didn't want it to mess me up. But my sister talked to her and she took me to the doctor when I was 14. My period lasted 9 days and was insanely heavy due to me being an anemic and having a few other health issues... none of which were actual imbalances in the hormones. I got cramps and migraines so bad I would have to stay home with the lights off curled up in a ball. Even when I started the pills it didn't help much. Sure my period became lighter and shorter but the pain was still there . We weren't sure if there was anything that could be done until I was 17. Then I was put on the pill continuously. No breaks. I just keep taking the pills with the meds in them and I get no side effects. But if I miss one or get sick and take too much vitamin C my period will start up.
So it really bugs me when people assume I'm taking it for baby reasons. I've never done anything and don't plan on doing anything for a while yet. I take it because I can not function without it. I also get annoyed when the US government spends so much time debating about birth control when it could be actually using that time to solve problems. Before ObamaCare- which many people STILL hate- I had to pay 100 dollars a month for my Pill and 50+ dollars for my depression and anxiety meds. Not to mention my thyroid and anti-seizure meds. Now they are all listed under the "necessary" label so they are free when we go to our pharmacy to pick them up... I'm so glad because of that.. For the longest time I wouldn't take my meds because I didn't want my family to have to spend so much money on me.. now I'm much closer to mentally and physically stable.