Well, in Germany we also use to mix beer with coke or lemonade. Quite common, everyone does it. And as a teenager it's even better. When I was a teenager and started to discover alcohol, it was a trend to have such drinks. There were even ready ones mixed. I had my first when I was 15, possibly shortly before turning 16, if I'm not mistaken. I actually had the plan to never drink, but well, as it is within a group...
I started with 2 I think and was quite drunken. They tasted quite ok. Pure beer I didn't like very much but when studying at university I decided to go for real beer, as it's cheaper to get drunken. And well, since then I really like the taste. I enjoy it during the summer, during the winter. It is my main alcoholic drink I have every once in a while, sometimes some more. On the other hand I don't have any other drugs or hardly drink any other alcohol. I just don't like the taste of hard alcohol..