Q: Is it normal that I click once and prompt have an monthly subscription?

So, I let my phone on the table, with its screen on, while  I was searching for Infos about the Apple Familie Abo for Apple Music, then I accidentally pressed on the screen and we'll yes, there was the Family Abo button,  and now I have bought it? Is this how it works? One click and I payed 15€ without even having to confirm? Normaly I have to remember enter my password to change a setting but not now? Im PRETTY upset right know and hope this is just a big mistake (I didn't even got a confirmation email until know)

Angry Greetings

Marvin R.