It might be a more abstract story. The beer can could represent a certain lifestyle or attitude that attracts two people to each other. Like a carefree, laid - back lifestyle associated with enjoying a beer from a can, and through that shared affinity, a love story unfolds.
A third theme could be relaxation. Beer is often associated with unwinding after a long day. In 'beer a love story', it could be about how beer provides a moment of peace and relaxation in a busy life, and how that relaxation is a form of love for the drink itself.
I think 'beer a love story' might refer to a story where beer plays a central role in a relationship. It could be that two people bond over their shared love for beer. They might go on beer - tasting trips together, or they have a special beer that they always share on their anniversaries or special occasions.
I'm not sure. It depends on various factors and the source or context of the term 'Cocaine Beer'. Maybe it's just a fictional concept or could potentially have some basis in reality, but without more specific information, it's hard to say for sure.